Cambridge Lower Secondary Checkpoint



SCIENCE 0893/02
Paper 2 October 2024
45 minutes

You must answer on the question paper.

No additional materials are needed.

INSTRUCTIONS
• Answer all questions.
• Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
• Write your name, centre number and candidate number in the boxes at the top of the page.
• Write your answer to each question in the space provided.
• Do not use an erasable pen or correction fluid.
• Do not write on any bar codes.
• You should show all your working in the booklet.
• You may use a calculator.

INFORMATION
• The total mark for this paper is 50.
• The number of marks for each question or part question is shown in brackets [ ].

This document has 20 pages. Any blank pages are indicated.

10_0893_02/8RP
© UCLES 2024 [Turn over
 2

1 This question is about characteristics between individuals.

(a) Complete the sentence.

The differences in characteristics between individuals of the same species is

called . [1]

(b) DNA in genes determines characteristics in humans.

Write down three characteristics determined only by genes.

3
[3]

2 The crust of the Earth is made of large tectonic plates.

Explain how the fossil record and the alignment of magnetic materials in the crust are evidence
for tectonic plates.

fossil record

alignment of magnetic materials

[3]

© UCLES 2024 0893/02/O/N/24

 3

3 Look at the diagram of part of the Periodic Table of the elements.

H He

Li Be B C N O F Ne

Na Mg Al Si P S Cl Ar

K Ca transition elements

(a) (i) The electronic structure of lithium is 2.1.

Write down the electronic structure of aluminium.

[1]

(ii) How many protons are there in one atom of sodium?

[1]

(b) Look at the diagram of the structure of magnesium oxide.

Key
_
2
oxide ion, O
2+
magnesium ion, Mg

Write down the type of bonding in magnesium oxide.

Explain your answer using information from the diagram.

[2]

© UCLES 2024 0893/02/O/N/24 [Turn over

 4

4 Ahmed makes this electrical circuit.

(a) Write down the name of these components.

[1]

(b) Ahmed investigates the effect of adding more lamps to his circuit.

Ahmed measures the current in the circuit when there:

• is one lamp
• are two lamps in series
• are three lamps in series
• are four lamps in series.

Suggest a hypothesis that Ahmed makes about the current in the circuits in his investigation.

Explain your answer.

[2]

© UCLES 2024 0893/02/O/N/24

 5

(c) Identify one safety hazard in this investigation.

safety hazard

Describe how this safety hazard is reduced.

reduced by

[2]

5 Look at the map showing the position of the tectonic plates.

A
B

(a) Which location, A, B, C or D, is most likely to have the largest number of volcanoes?

[1]

(b) Write down the name of the process that causes the tectonic plates to move.

[1]

© UCLES 2024 0893/02/O/N/24 [Turn over

 6

6 The drawing shows a black rhino.

The graph shows the world population of black rhinos.

100 000

80 000

60 000
population
of
black
rhinos
40 000

20 000

0
1960 1970 1980 1990 2000 2010 2020
year

Write down two reasons for the trend in the world population of black rhinos.

2
[2]

© UCLES 2024 0893/02/O/N/24

 7

7 Magnesium reacts with zinc sulfate solution.

A displacement reaction happens.

(a) Complete the word equation for the reaction.

magnesium + zinc sulfate +

[1]

(b) Copper is added to zinc sulfate solution.

Explain why there is no reaction.

Tick () the correct answer.

Copper sulfate is more reactive than zinc sulfate.

Zinc sulfate is more reactive than copper sulfate.

Zinc is more reactive than copper.

Copper is more reactive than zinc.

[1]

© UCLES 2024 0893/02/O/N/24 [Turn over

 8

8 This question is about sound waves.

(a) Look at these two identical sound waves.

and

Which word describes how these two identical sound waves interact?

[1]

© UCLES 2024 0893/02/O/N/24

 9

(b) Sound wave A interacts with sound wave B.

distance
from time
centre in s
in cm

sound wave A

distance
from
centre time
in cm in s

sound wave B

(i) Write down one similarity between the new sound wave produced and sound wave A.

[1]

(ii) Complete the sentences.

The loudness of the new sound wave is than sound wave A.

This is because the waveform of the new sound wave has a smaller

.
[2]

© UCLES 2024 0893/02/O/N/24 [Turn over

 10

9 Yuri investigates the mass of magnesium salts in 1 kg samples of four different soils A, B, C
and D.

He writes his results in a notebook.

soil A is 5.0 g
D is 6.4
B = 0.4 g
there are 35.0 g in C

Draw a table and write all the results from the notebook in your table.

Include the headings.

[3]

© UCLES 2024 0893/02/O/N/24

 11

10 The diagram shows the modern model of the structure of an atom.

proton

electron

neutron

(a) This model may change in the future.

Explain why.

[1]

(b) The chemical formula for water is H2O.

Look at the information about two other chemical formulae.

The formula of:

• iron oxide contains 2 atoms of iron and 3 atoms of oxygen

• sodium carbonate contains 2 atoms of sodium, 1 atom of carbon and 3 atoms of oxygen.

Write down the chemical formula for iron oxide and the chemical formula for
sodium carbonate.

iron oxide

sodium carbonate
[2]

© UCLES 2024 0893/02/O/N/24 [Turn over

 12

11 This question is about thermal energy.

(a) Mia holds a handwarmer.

The handwarmer produces 1250 J of thermal energy.

Only 900 J of thermal energy transfers to her hand from the handwarmer.

Calculate how much thermal energy dissipates to the surroundings.

thermal energy = J [1]

(b) Mia assembles the equipment shown in the diagram.

glass tube A glass tube B

box

burning candle
glass

The equipment demonstrates a method of thermal (heat) transfer.

The arrows in the diagram show the air flow in glass tube A, the box and glass tube B.

Explain why the air flows in the direction of the arrows.

[3]

© UCLES 2024 0893/02/O/N/24

 13

12 This question is about processes in the carbon cycle.

(a) Draw a straight line to match each process to its correct description.

process description

respiration breakdown of dead organisms

feeding releases energy in cells

a chemical reaction between a

decomposition
fossil fuel and oxygen

obtaining nutrients from other

combustion
organisms

[2]

(b) How many of these processes release carbon dioxide into the air?

[1]

(c) Write down which one of these processes has increased in the last 100 years due to human
activity.

Explain your answer.

process

explanation

[1]

(d) Write down the name of one other process in the carbon cycle.

[1]

© UCLES 2024 0893/02/O/N/24 [Turn over

 14

13 Chen investigates the reaction between magnesium and dilute hydrochloric acid.

Look at the diagram of the equipment he uses.

20 40 60 80 100 cm3

gas syringe
flask

dilute hydrochloric acid

magnesium powder

Chen:

• adds 50 cm3 of dilute hydrochloric acid to the flask

• then adds 0.5 g of magnesium powder to the flask
• takes readings of the total volume of gas made every 10 s during the reaction.

Look at the table of his results.

time total volume of gas made

in s in cm3

0 0

10 20

20 35

40 49

50 50

60 50

© UCLES 2024 0893/02/O/N/24

 15

(a) (i) Complete Chen’s graph by:

• plotting all the points

• drawing the curve of best fit.

60

50

40

total
volume of
30
gas made
in cm3

20

10

0
0 10 20 30 40 50 60
time in s
[2]

(ii) Chen does not measure the total volume of gas made in 30 s.

Predict the total volume of gas made in 30 s.

volume of gas made in 30 s = cm3 [1]

(b) Chen repeats the experiment using lumps of magnesium.

The rate of this reaction is slower.

Explain why using the particle model.

[2]

© UCLES 2024 0893/02/O/N/24 [Turn over

 16

14 Jamila and Lily discuss fetal development.

Jamila says,
‘I read on the internet that a mother can eat anything
she likes when she is pregnant and it will not harm the fetus.’

Lily says,

‘I don’t agree. I think a good diet is

very important for fetal development.’

Who do you agree with?

Give one reason for your answer.

[1]

15 Plants use water in photosynthesis.

(a) Write down the word equation for photosynthesis.

[2]

(b) Photosynthesis needs an energy source.

What is the energy source for photosynthesis?

[1]

© UCLES 2024 0893/02/O/N/24

 17

BLANK PAGE

© UCLES 2024 0893/02/O/N/24

 18

BLANK PAGE

© UCLES 2024 0893/02/O/N/24

 19

BLANK PAGE

Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.

To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge
Assessment International Education Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download
at www.cambridgeinternational.org after the live examination series.

Cambridge Assessment International Education is part of Cambridge Assessment. Cambridge Assessment is the brand name of the University of Cambridge
Local Examinations Syndicate (UCLES), which is a department of the University of Cambridge.

© UCLES 2024 0893/02/O/N/24 [Turn over

 The Periodic Table of Elements

© UCLES 2024
Group
1 2 3 4 5 6 7 8
1 2
H He
hydrogen helium
Key 1 4
3 4 atomic number 5 6 7 8 9 10

Li Be atomic symbol B C N O F Ne
lithium beryllium name boron carbon nitrogen oxygen fluorine neon
7 9 relative atomic mass 11 12 14 16 19 20
11 12 13 14 15 16 17 18
Na Mg Al Si P S Cl Ar
sodium magnesium aluminium silicon phosphorus sulfur chlorine argon
23 24 27 28 31 32 35.5 40
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
potassium calcium scandium titanium vanadium chromium manganese iron cobalt nickel copper zinc gallium germanium arsenic selenium bromine krypton
39 40 45 48 51 52 55 56 59 59 64 65 70 73 75 79 80 84
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
20

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
rubidium strontium yttrium zirconium niobium molybdenum technetium ruthenium rhodium palladium silver cadmium indium tin antimony tellurium iodine xenon
85 88 89 91 93 96 – 101 103 106 108 112 115 119 122 128 127 131

0893/02/O/N/24
55 56 57–71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
lanthanoids
Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
caesium barium hafnium tantalum tungsten rhenium osmium iridium platinum gold mercury thallium lead bismuth polonium astatine radon
133 137 178 181 184 186 190 192 195 197 201 204 207 209 – – –
87 88 89–103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118
actinoids
Fr Ra Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
francium radium rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium copernicium nihonium flerovium moscovium livermorium tennessine oganesson
– – – – – – – – – – – – – – – – –

57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
lanthanoids La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
lanthanum cerium praseodymium neodymium promethium samarium europium gadolinium terbium dysprosium holmium erbium thulium ytterbium lutetium
139 140 141 144 – 150 152 157 159 163 165 167 169 173 175
89 90 91 92 93 94 95 96 97 98 99 100 101 102 103
actinoids Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
actinium thorium protactinium uranium neptunium plutonium americium curium berkelium californium einsteinium fermium mendelevium nobelium lawrencium
– 232 231 238 – – – – – – – – – – –
Science
Stage 9

Paper 2 2024

45 minutes

No additional materials are needed.

INSTRUCTIONS
• Answer all questions.
• Write your answer to each question in the space provided.
• You should show all your working on the question paper.

INFORMATION
• The total mark for this paper is 50.
• The number of marks for each question or part question is shown in brackets [ ].

3146_02_7RP
© UCLES 2024
 2

1 Look at the diagram of part of the cross-section of a plant leaf.

upper layer

palisade layer

vein

spongy layer

lower layer

stoma

(a) The palisade layer contains many chloroplasts.

(i) What process happens inside chloroplasts?

[1]

(ii) Name two gases exchanged through the stoma.

2
[2]

(b) Chloroplasts contain chlorophyll.

What is the function of chlorophyll?

[1]

© UCLES 2024 S/S9/02

 3

2 The diagram shows a model of the atomic structure of a sodium atom and a chlorine atom.

Na Cl

A sodium atom and a chlorine atom react together to make a sodium ion, Na+, and a chloride ion,
Cl –.

(a) Describe how a sodium atom and a chlorine atom become charged ions.

sodium atom

chlorine atom

[2]

(b) Describe how ions are held together in an ionic compound.

[2]

© UCLES 2024 S/S9/02 [Turn over

 4

3 This question is about thermal transfer.

Decide if each sentence is true or false.

Tick () the correct box.

sentence true false

Heat is the word used to measure how hot an object is.

Thermal energy is measured in °C.

When thermal energy is transferred, more thermal

energy is created.

Thermal energy always transfers from hotter objects to

colder objects.

Heat dissipation happens when thermal energy

transfers from a hotter region to a colder region.

A liquid is a good thermal energy conductor.

Convection happens in liquids and gases only.

Radiation needs particles to transfer thermal energy.

[4]

© UCLES 2024 S/S9/02

 5

4 Look at the diagram of a model of the Earth’s crust and upper mantle.
crust
X

upper
mantle

(a) Name one event that happens at X.

[1]

(b) What do the arrows on the diagram represent?

[1]

© UCLES 2024 S/S9/02 [Turn over

 6

5 The diagram shows a circuit with two lamps.

Complete the circuit diagram to show how to measure the voltage across one of the lamps. [2]

© UCLES 2024 S/S9/02

 7

6 Safia is making a salt called copper chloride.

She adds insoluble copper carbonate to dilute hydrochloric acid.

Water and carbon dioxide are also produced.

(a) Write the word equation for this reaction.

[2]

(b) Complete the information about the method Safia uses to make copper chloride.

Safia:

• adds excess copper carbonate to dilute hydrochloric acid

• separates the excess copper carbonate from the reaction mixture by

• pours the filtrate into an evaporating basin

• obtains a saturated solution from the filtrate by

• leaves the saturated solution in a warm place to .

[3]

(c) Suggest one piece of safety equipment Safia uses when making copper chloride.

[1]

© UCLES 2024 S/S9/02 [Turn over

 8

7 Mike investigates the temperature of a classroom every day for five days.

Look at the table of his results.

temperature
day
in °C
1 21.0

2 21.5

3 22.3

4 21.8

5 22.4

(a) Mike starts to plot the results in a bar chart.

Complete his bar chart.

23.0

22.0
temperature
in °C

21.0

20.0
1 2 3 4 5
day
[2]

(b) Carlos tells Mike to measure the temperature twice each day at the same time of day.

Explain why this improves the investigation.

[1]

© UCLES 2024 S/S9/02

 9

8 Scientists think the Moon was formed during a collision between the Earth and another small
planet.

This is called the collision theory for the formation of the Moon.

Describe three reasons why rocks collected from the Moon support this collision theory.

[3]

© UCLES 2024 S/S9/02 [Turn over

 10

9 The diagram shows the genetic material inside an animal cell.

D
C

E
NOT TO SCALE

© UCLES 2024 S/S9/02

 11

Look at parts A, B, C, D and E.

(a) Circle the letter that shows a chromosome.

A B C D E
[1]

(b) Circle the letter that controls a single characteristic such as eye colour.

A B C D E
[1]

(c) Write down the name of the chemical that is in a chromosome.

[1]

© UCLES 2024 S/S9/02 [Turn over

 12

10 Ahmed wants to find the density of dry sand.

The dry sand has a mass of 150 g and a volume of 100 cm3.

Calculate the density of the dry sand.

Include the unit of density in your answer.

density = unit
[3]

© UCLES 2024 S/S9/02

 13

11 Mia investigates an electrical circuit.

(a) She makes this prediction,

‘Adding more lamps into a series circuit

does not change the current in the circuit.’

Tick () to show if Mia's prediction is correct.

yes no

Give a reason for your answer.

[1]

(b) The current flowing through a lamp is 4.5 A.

The voltage across the lamp is 1.5 V.

Calculate the resistance of the lamp.

resistance = Ω [2]

© UCLES 2024 S/S9/02 [Turn over

 14

12 (a) A scientist develops a model about climate change.

The scientist makes this prediction in 2013.

‘By the year 2100 the average temperature

at the Earth’s surface will rise by 1.5 °C.’

The same scientist changes the prediction in 2023.

‘By the year 2100 the average temperature

at the Earth’s surface will rise by 2.5 °C.’

Suggest two reasons why the scientist changes the prediction.

2
[2]

(b) The scientist plans an investigation to monitor air temperature during a period of one year.

(i) The scientist uses a thermometer to measure air temperature.

Look at the diagram showing part of the thermometer.

°C
24

23

22

What is the temperature reading on the thermometer?

°C [1]

© UCLES 2024 S/S9/02

 15

(ii) Tick () which plan gives the most appropriate evidence for the investigation.

Measure the air temperature every day for one year.

Measure the air temperature once a month for one year.

Measure the air temperature once a week for one year.

Measure the air temperature twice a day for one year.

[1]

© UCLES 2024 S/S9/02 [Turn over

 16

13 Pierre investigates how a lack of magnesium affects plants.

(a) The diagram shows the equipment he uses.

plant

cotton wool
lid

beaker

control solution test solution

control solution contains all test solution contains all

the dissolved minerals a plant needs the dissolved minerals a plant needs
but not magnesium

Pierre measures the chlorophyll content in the leaves of both plants every day.

(i) Pierre uses pure water to make the control solution and the test solution.

Explain why Pierre uses pure water and not water from a tap.

[1]

© UCLES 2024 S/S9/02

 17

(ii) Look at a graph of his results.

25

20

chlorophyll 15 key
content of control solution
leaves 10 test solution
in micrograms
5

0
0 1 2 3 4 5 6 7 8 9
time
in days

Write down two conclusions about how magnesium affects the chlorophyll content of
leaves.

[2]

(b) Three solutions contain different percentages of minerals.

solution A solution B solution C

nitrates 2.0% nitrates 6.0% nitrates 4.0%

magnesium 1.0% magnesium 0.2% magnesium 1.2%

Which solution increases photosynthesis the most?

Explain why.

[1]

© UCLES 2024 S/S9/02 [Turn over

 18

14 Angelique makes an electrical circuit with a buzzer and a lamp.

(a) Draw the standard electrical symbol for a buzzer.

[1]

(b) She uses an electrical component to control the brightness of the lamp.

Draw the standard electrical symbol for this component.

[1]

© UCLES 2024 S/S9/02

 19

15 Polar bears live in the Arctic.

Their main habitat is sea ice.

Polar bears use the sea ice when they are hunting for food.

This sea ice is melting.

Suggest how sea ice melting affects the polar bear population.

Give two reasons for your answer.

polar bear population

reason 1

reason 2

[3]

Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.

To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge Assessment
International Education Copyright Acknowledgements Booklet. This is produced annually and is available to download at
https://lowersecondary.cambridgeinternational.org/

Cambridge Assessment International Education is part of Cambridge Assessment. Cambridge Assessment is the brand name of the University of Cambridge
Local Examinations Syndicate (UCLES), which is a department of the University of Cambridge.

© UCLES 2024 S/S9/02 [Turn over

 The Periodic Table of Elements

© UCLES 2024
Group
1 2 3 4 5 6 7 8
1 2
H He
hydrogen helium
Key 1 4
3 4 atomic number 5 6 7 8 9 10
Li Be atomic symbol B C N O F Ne
lithium beryllium name boron carbon nitrogen oxygen fluorine neon
7 9 relative atomic mass 11 12 14 16 19 20
11 12 13 14 15 16 17 18

Na Mg Al Si P S Cl Ar
sodium magnesium aluminium silicon phosphorus sulfur chlorine argon
23 24 27 28 31 32 35.5 40
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
potassium calcium scandium titanium vanadium chromium manganese iron cobalt nickel copper zinc gallium germanium arsenic selenium bromine krypton
39 40 45 48 51 52 55 56 59 59 64 65 70 73 75 79 80 84
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
20

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe

S/S9/02
rubidium strontium yttrium zirconium niobium molybdenum technetium ruthenium rhodium palladium silver cadmium indium tin antimony tellurium iodine xenon
85 88 89 91 93 96 – 101 103 106 108 112 115 119 122 128 127 131
55 56 57–71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
lanthanoids
Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
caesium barium hafnium tantalum tungsten rhenium osmium iridium platinum gold mercury thallium lead bismuth polonium astatine radon
133 137 178 181 184 186 190 192 195 197 201 204 207 209 – – –
87 88 89–103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118
actinoids
Fr Ra Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
francium radium rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium copernicium nihonium flerovium moscovium livermorium tennessine oganesson
– – – – – – – – – – – – – – – – –

57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
lanthanoids La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
lanthanum cerium praseodymium neodymium promethium samarium europium gadolinium terbium dysprosium holmium erbium thulium ytterbium lutetium
139 140 141 144 – 150 152 157 159 163 165 167 169 173 175
89 90 91 92 93 94 95 96 97 98 99 100 101 102 103
actinoids Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
actinium thorium protactinium uranium neptunium plutonium americium curium berkelium californium einsteinium fermium mendelevium nobelium lawrencium
– 232 231 238 – – – – – – – – – – –
Cambridge Lower Secondary Sample Test
For use with curriculum published in
September 2020

Science Paper 2
Stage 9
45 minutes

Name

No additional materials are needed.

INSTRUCTIONS
• Answer all questions.
• Write your answer to each question in the space provided.
• You should show all your working on the question paper.

INFORMATION
• The total mark for this paper is 50.
• The number of marks for each question or part question is shown in brackets [ ].

Science_S9_02/7RP
© UCLES 2020
 2

1 The diagram shows a flowering plant.

Plants need to absorb water and transport it to all of their living parts.

(a) (i) Name the process that plants use to absorb water through the roots.

[1]

(ii) Name the tissue that transports water to different parts of the plant.

[1]

(iii) Name the part of the plant that loses water by transpiration.

[1]

© UCLES 2020 S/S9/02

 3

(b) Several factors affect the amount of water lost by transpiration.

Chen uses this equipment to measure the rate of transpiration.

thermometer leafy shoot

layer of oil

stop-clock

measuring cylinder containing water

Chen predicts that the temperature of the air affects the rate of transpiration.

(i) Which variable must Chen change to test his prediction?

[1]

(ii) State two variables that Chen needs to control in his investigation.

2
[2]

(iii) Describe how Chen measures the rate of transpiration.

[1]

(iv) Predict the effect of changing the temperature of the air on the rate of transpiration.

[1]

© UCLES 2020 S/S9/02 [Turn over

 4

2 Look at the diagram of a water molecule, H2O.

H H
O

(a) State the type of bonding in a water molecule.

Explain how you can tell.

[2]

(b) An oxygen atom has the electronic structure 2.6.

To which group of the Periodic Table does oxygen belong?

[1]

© UCLES 2020 S/S9/02

 5

3 Yuri investigates some sound waves.

Sound waves can interact to reinforce or cancel each other.

Yuri looks at the waveforms the sound waves make on an oscilloscope.

Complete the two diagrams to show what happens when each pair of waveforms interacts.

waveform 1 waveform 1

waveform 2 waveform 2

waveform 1 + waveform 2 waveform 1 + waveform 2

[3]

© UCLES 2020 S/S9/02 [Turn over

 6

4 The diagram shows part of the carbon cycle.

carbon dioxide
in the atmosphere

A
C
B B

green plants animals

D

fossil fuels

(a) The boxes A, B, C and D show four important processes in the carbon cycle.

Name each of these processes.

D
[4]

(b) Electricity is often generated using fossil fuels.

Many countries generate their electricity using renewable energy resources such as wind
turbines and solar panels.

Predict the effect of using renewable energy resources, rather than fossil fuels, on the carbon
cycle.

Explain the reason for your prediction.

[2]

© UCLES 2020 S/S9/02

 7

(c) Scientists use evidence of climate change to predict damaging effects on ecosystems.

(i) State one piece of evidence for climate change.

[1]

(ii) Suggest two effects of climate change.

[2]

© UCLES 2020 S/S9/02 [Turn over

 8

5 Lily compares the densities of three substances A, B and C.

Look at her table of information.

mass volume density

substance
in grams in cm3 in g / cm3
A 90.0 20
B 3.2 1000 0.0032
C 9.7 10 0.97

(a) Calculate the density of substance A.

density of substance A = g / cm3 [2]

(b) Suggest which substance A, B or C is a gas.

Explain your answer.

[2]

© UCLES 2020 S/S9/02

 9

6 Answer the questions about thermal (heat) energy transfer.

Choose from the list.

conduction conductor convection radiator

evaporation insulation insulator radiation

(a) What is the main form of thermal energy transfer in solids?

[1]

(b) What is the main form of thermal energy transfer in liquids and gases?

[1]

(c) Complete the sentences using words from the list.

(i) Saucepan handles are made from wood.

This is because wood is a good . [1]

(ii) Copper is a metal, so it is a good . [1]

© UCLES 2020 S/S9/02 [Turn over

 10

7 The diagram shows an egg cell and a sperm cell.

nucleus
nucleus

NOT TO SCALE

(a) (i) The nucleus of the egg cell and the nucleus of the sperm cell both contain chromosomes.

What are chromosomes made of?

[1]

(ii) Describe what happens to the nucleus of the egg cell and the nucleus of the sperm cell
during fertilisation.

[1]

(iii) Which of these cells, the egg or the sperm, determines the sex of the offspring?

Explain your answer. Use ideas about chromosomes.

cell

explanation

[2]

© UCLES 2020 S/S9/02

 11

(b) The drawing shows a group of cats.

Although they all look different they all belong to the same species.

(i) What term describes the differences that occur within the same species?

[1]

(ii) Why do the cats look different?

[1]

© UCLES 2020 S/S9/02 [Turn over

 12

8 Pierre investigates the reaction between lumps of zinc and dilute hydrochloric acid.

dilute hydrochloric acid

zinc

(a) Pierre finds that the reaction is faster if he heats the dilute hydrochloric acid.

Explain why, using the particle model.

[2]

(b) Pierre wants to make the reaction go faster.

He does not want to change the:

• volume of the dilute hydrochloric acid

• temperature of the dilute hydrochloric acid
• mass of zinc.

Describe one other way that Pierre can make the reaction go faster.

[1]

(c) Pierre wants to measure the volume of gas given off during the reaction.

Complete the diagram of the equipment Pierre uses to collect and measure the volume of the
gas.

[2]

© UCLES 2020 S/S9/02

 13

(d) Pierre does a risk assessment on his investigation.

He decides to wear safety goggles.

Why does he decide to wear safety goggles?

[1]

© UCLES 2020 S/S9/02 [Turn over

 14

9 Safia investigates the current in a circuit containing two identical lamps.

direction of
current flow

A1 A4

X A2 Y

A3

She changes the number of cells and measures the currents A1 to A4 in amps.

Look at her results.

current in amps

number of cells A1 A2 A3 A4

1 0.4 0.2 0.2 0.4

2 0.6 0.3 0.3 0.6

3 0.8 0.4 0.4 0.8

4 1.2 0.6 0.6 1.2

5 1.4 0.7 0.7 2.8

6 1.8 0.9 0.9 1.8

(a) What do the results tell you about what happens to the current in the circuit at points
X and Y?

[2]

(b) One of the results is anomalous.

Circle the result in the table that is anomalous. [1]

© UCLES 2020 S/S9/02

 15

(c) Predict the values of A2, A3 and A4 if the value for A1 is 1.6 A.

A1 = 1.6 A

A2 = A

A3 = A

A4 = A
[1]

10 Carlos investigates electrical resistance.

Look at his circuit.

A
resistor R

The reading on the ammeter is 0.6 A.

The reading on the voltmeter is 1.8 V.

(a) Calculate the resistance of resistor R. Include the units.

resistance of resistor R = units [2]

(b) Carlos replaces R with a resistor of greater resistance.

What happens to the reading on the ammeter?

[1]

© UCLES 2020 S/S9/02

 The Periodic Table of Elements

© UCLES 2020
Group
I II III IV V VI VII VIII

Copyright © UCLES, 2020

1 2
H He
hydrogen helium
Key 1 4
3 4 atomic number 5 6 7 8 9 10
Li Be atomic symbol B C N O F Ne
lithium beryllium name boron carbon nitrogen oxygen fluorine neon
7 9 relative atomic mass 11 12 14 16 19 20

make amends at the earliest possible opportunity.

11 12 13 14 15 16 17 18

Na Mg Al Si P S Cl Ar
sodium magnesium aluminium silicon phosphorus sulfur chlorine argon
23 24 27 28 31 32 35.5 40
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
potassium calcium scandium titanium vanadium chromium manganese iron cobalt nickel copper zinc gallium germanium arsenic selenium bromine krypton
39 40 45 48 51 52 55 56 59 59 64 65 70 73 75 79 80 84
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
rubidium strontium yttrium zirconium niobium molybdenum technetium ruthenium rhodium palladium silver cadmium indium tin antimony tellurium iodine xenon
16

85 88 89 91 93 96 – 101 103 106 108 112 115 119 122 128 127 131

S/S9/02
55 56 57–71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
lanthanoids
Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
caesium barium hafnium tantalum tungsten rhenium osmium iridium platinum gold mercury thallium lead bismuth polonium astatine radon
133 137 178 181 184 186 190 192 195 197 201 204 207 209 – – –
87 88 89–103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

Local Examinations Syndicate (UCLES), which itself is a department of the University of Cambridge.
actinoids
Fr Ra Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
francium radium rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium copernicium nihonium flerovium moscovium livermorium tennessine oganesson
– – – – – – – – – – – – – – – – –

57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
lanthanoids La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
lanthanum cerium praseodymium neodymium promethium samarium europium gadolinium terbium dysprosium holmium erbium thulium ytterbium lutetium
139 140 141 144 – 150 152 157 159 163 165 167 169 173 175
89 90 91 92 93 94 95 96 97 98 99 100 101 102 103
actinoids Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
actinium thorium protactinium uranium neptunium plutonium americium curium berkelium californium einsteinium fermium mendelevium nobelium lawrencium
– 232 231 238 – – – – – – – – – – –

The volume of one mole of any gas is 24 dm3 at room temperature and pressure (r.t.p.).

Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort
Cambridge Assessment International Education is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of the University of Cambridge

has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to
Science
Stage 9

Paper 2 2025

45 minutes

No additional materials are needed.

INSTRUCTIONS
• Answer all questions.
• Write your answer to each question in the space provided.
• You should show all your working on the question paper.

INFORMATION
• The total mark for this paper is 50.
• The number of marks for each question or part question is shown in brackets [ ].

3146_02_4RP
© UCLES 2025
 2

1 The diagram shows the pathway of water through a plant.

soil

(a) Name the type of cell where water enters the plant.

[1]

(b) Water from the soil enters a plant.

Write down the name of this process.

[1]

(c) Water passes from the root, through the stem to the leaf.

Name the vessel in the stem that the water passes through.

[1]

(d) Water moves from the leaf to the air.

Write down the name of this process.

[1]

© UCLES 2025 S/S9/02

 3

2 (a) Complete the sentences about chemical bonding.

(i) The type of bond made when a pair of electrons is shared by two atoms is called

a bond. [1]

(ii) When an atom an electron, a positive ion is made. [1]

(b) What is an ionic bond?

[1]

3 Look at the diagram of sound waveform A.

sound waveform A

Draw on the grid a sound waveform B that completely cancels out sound waveform A.

sound waveform B
[1]

© UCLES 2025 S/S9/02 [Turn over

 4

4 Aiko finds a drawing of a desert.

She draws a diagram to show the different causes of desertification.

grassland with too land over used for trees cut down by less rain
many animals crops humans

soil becomes bare

soil eroded by wind

and water

desertification

© UCLES 2025 S/S9/02

 5

(a) Climate change causes desertification.

Circle the cause of desertification due to climate change.

grassland with too many animals

land over used for crops

trees cut down by humans

less rain
[1]

(b) Suggest two future impacts of desertification.

[2]

© UCLES 2025 S/S9/02 [Turn over

 6

5 Complete these sentences about how plants make glucose.

(a) Plants use energy from light, and

to make glucose and .

[3]

(b) Plants make glucose using the process of .

This process takes place in structures in some leaf cells.

These structures are called .

[2]

© UCLES 2025 S/S9/02

 7

6 Look at part of the reactivity series.

calcium most reactive

magnesium

zinc

iron

copper

silver

gold least reactive

(a) Zinc, Zn, reacts with copper sulfate solution, CuSO4.

Zinc sulfate solution, ZnSO4 and copper, Cu, are made.

Write the symbol equation for this reaction.

[1]

(b) Predict if copper reacts with magnesium sulfate solution.

Tick () the correct answer.

yes no

Explain your answer.

[1]

(c) Predict if iron reacts with silver nitrate solution.

Tick () the correct answer.

yes no

Explain your answer.

[1]

© UCLES 2025 S/S9/02 [Turn over

 8

7 Oliver makes a series electrical circuit.

Here is a diagram of his electrical circuit.

ammeter

lamp

switch battery

(a) (i) Oliver wants to measure the voltage across the lamp.

Write down the name of the meter that measures voltage.

[1]

(ii) Oliver uses this meter to measure the voltage across the lamp.

Draw on the diagram to show where and how the meter is connected.

Use this shape for the meter.

Use lines for wires.

[1]

(b) Oliver writes down the readings from the meters in his electrical circuit.

voltage = 1.5 V

current = 0.6 A

Calculate the resistance of the lamp.

resistance = Ω [2]

© UCLES 2025 S/S9/02

 9

8 Scientists are concerned that some asteroids may collide with the Earth.

NASA sent a spacecraft to collide with a small asteroid.

small asteroid

NOT TO SCALE

The small asteroid was destroyed.

(a) Suggest why NASA destroyed the small asteroid.

[1]

(b) One consequence of a large asteroid hitting the Earth is climate change.

Describe one other consequence of a large asteroid hitting the Earth.

[1]

© UCLES 2025 S/S9/02 [Turn over

 10

9 These varieties of lettuce are from the same species.

Look at the diagram of one leaf from each variety of lettuce.

A B C

D E DRAWN TO SCALE

Key

Yes: go to question 3
1 Does the leaf have a rounded end?
No: go to question 2

Yes: mizuna
2 Is the leaf longer than it is wide?
No: endive

Yes: oak leaf

3 Is the rounded end of the leaf dark in colour?
No: go to question 4

Yes: purslane
4 Is the leaf small and oval in shape?
No: romaine

Use the key to identify each variety of lettuce.

E
[2]

© UCLES 2025 S/S9/02

 11

10 (a) A sample of substance X has a mass of 150 g and a volume of 25 cm3.

Calculate the density of substance X.

Include the unit of density.

density of substance X = unit [3]

(b) Substance X has a melting point of 1852 oC and a boiling point of 4377 oC.

Suggest the type of structure in substance X.

[1]

© UCLES 2025 S/S9/02 [Turn over

 12

11 This question is about heat and temperature.

Lily has two blocks of metal.

block A block B

Block A has a higher temperature than block B.

Lily puts the blocks together.

block A block B

(a) Describe what happens when the two blocks touch each other.

[1]

(b) Describe what happens when the two blocks are together for 10 minutes.

[1]

© UCLES 2025 S/S9/02

 13

12 Hassan investigates the reaction between magnesium and dilute hydrochloric acid.

The reaction makes hydrogen gas.

Hassan adds 0.5 g of magnesium to 25 cm3 of dilute hydrochloric acid.

He measures the total volume of hydrogen gas made every minute for 4 minutes.

Look at his results.

The volume after 3 minutes is 45 cm3

20 cm3 = 1 minute
At the start the volume is 0 cm3

2 minutes = 35 cm3

50 cm3 is the volume after 4 minutes

Hassan presents his results in a table.

Complete the table of results.

[3]

© UCLES 2025 S/S9/02 [Turn over

 14

13 Chen runs for 20 minutes.

He is hot.

Chen has liquid water on his skin.

Explain how the evaporation of the liquid water cools his skin.

[2]

14 Rajiv uses the internet to find out about the carbon cycle.

He finds out that there are two types of carbon cycle.

• slow carbon cycle

Carbon in fossil fuels leaks slowly into the atmosphere as carbon dioxide through
volcanic activity.
This takes millions of years.

• fast carbon cycle

Humans burn fossil fuels such as oil to release very large amounts of carbon dioxide into the
atmosphere every year.
Rajiv also finds this graph.

12

10

global 8
carbon
dioxide 6
released in
billions of
tonnes 4

0
1850 1875 1900 1925 1950 1975 2000 2025 2050
year

(a) There are no values of carbon dioxide released shown on the graph between 1850 and
1865.
Suggest why.

[1]

© UCLES 2025 S/S9/02

 15

(b) Describe the trend in the amount of carbon dioxide released from the year 1850 to the
year 2000.

Explain the trend.

Use ideas about the slow carbon cycle and the fast carbon cycle.

description of trend

explanation

[2]

(c) Suggest a value for the amount of global carbon dioxide released in 2025.

billions of tonnes [1]

© UCLES 2025 S/S9/02 [Turn over

 16

15 Mike investigates the rate water is absorbed by a plant.

The diagram shows some of the equipment he uses.

leaves

vein

stem

solution of red dye

© UCLES 2025 S/S9/02

 17

(a) Mike waits until the veins of the leaves are red in colour.

leaves

vein

stem

solution of red dye

Write down two measurements he takes to measure the rate water is absorbed by the plant.

Name the two pieces of equipment he uses to take these measurements.

measurement 1

equipment 1

measurement 2

equipment 2
[2]

(b) Mike decides to repeat the experiment three times.

Explain why.

[1]

© UCLES 2025 S/S9/02 [Turn over

 18

16 Jamila and Safia investigate convection.

Jamila:

• adds blue dye to cold water

• pours the cold blue water into water at room temperature.

Safia:

• adds red dye to hot water

• pours the hot red water into water at room temperature.

Jamila Safia

cold blue
water
hot red
water

water at room
temperature

© UCLES 2025 S/S9/02

 19

(a) Look at Safia in the picture.

She has not made a risk assessment.

Complete the table to identify two risks and describe how to control these risks.

risk how to control the risk

…………………………………….. …………………………………………..

…………………………………….. …………………………………………..

…………………………………….. …………………………………………..

…………………………………….. …………………………………………..

[2]
(b) Predict what happens to the cold blue water and the hot red water.

Explain your answers.

Use ideas about density and convection.

prediction for cold blue water

explanation

prediction for hot red water

explanation

[3]

Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.

To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge Assessment
International Education Copyright Acknowledgements Booklet. This is produced annually and is available to download at
https://lowersecondary.cambridgeinternational.org/

Cambridge Assessment International Education is part of Cambridge Assessment. Cambridge Assessment is the brand name of the University of Cambridge
Local Examinations Syndicate (UCLES), which is a department of the University of Cambridge.

© UCLES 2025 S/S9/02 [Turn over

 The Periodic Table of Elements

© UCLES 2025
Group
1 2 3 4 5 6 7 8
1 2
H He
hydrogen helium
Key 1 4
3 4 atomic number 5 6 7 8 9 10
Li Be atomic symbol B C N O F Ne
lithium beryllium name boron carbon nitrogen oxygen fluorine neon
7 9 relative atomic mass 11 12 14 16 19 20
11 12 13 14 15 16 17 18

Na Mg Al Si P S Cl Ar
sodium magnesium aluminium silicon phosphorus sulfur chlorine argon
23 24 27 28 31 32 35.5 40
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
potassium calcium scandium titanium vanadium chromium manganese iron cobalt nickel copper zinc gallium germanium arsenic selenium bromine krypton
39 40 45 48 51 52 55 56 59 59 64 65 70 73 75 79 80 84
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
20

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe

S/S9/02
rubidium strontium yttrium zirconium niobium molybdenum technetium ruthenium rhodium palladium silver cadmium indium tin antimony tellurium iodine xenon
85 88 89 91 93 96 – 101 103 106 108 112 115 119 122 128 127 131
55 56 57–71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
lanthanoids
Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
caesium barium hafnium tantalum tungsten rhenium osmium iridium platinum gold mercury thallium lead bismuth polonium astatine radon
133 137 178 181 184 186 190 192 195 197 201 204 207 209 – – –
87 88 89–103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118
actinoids
Fr Ra Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
francium radium rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium copernicium nihonium flerovium moscovium livermorium tennessine oganesson
– – – – – – – – – – – – – – – – –

57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
lanthanoids La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
lanthanum cerium praseodymium neodymium promethium samarium europium gadolinium terbium dysprosium holmium erbium thulium ytterbium lutetium
139 140 141 144 – 150 152 157 159 163 165 167 169 173 175
89 90 91 92 93 94 95 96 97 98 99 100 101 102 103
actinoids Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
actinium thorium protactinium uranium neptunium plutonium americium curium berkelium californium einsteinium fermium mendelevium nobelium lawrencium
– 232 231 238 – – – – – – – – – – –
 Cambridge Lower Secondary Checkpoint


SCIENCE 0893/02
Paper 2 April 2023
45 minutes

You must answer on the question paper.

No additional materials are needed.

INSTRUCTIONS
• Answer all questions.
• Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
• Write your name, centre number and candidate number in the boxes at the top of the page.
• Write your answer to each question in the space provided.
• Do not use an erasable pen or correction fluid.
• Do not write on any bar codes.
• You should show all your working in the booklet.
• You may use a calculator.

INFORMATION
• The total mark for this paper is 50.
• The number of marks for each question or part question is shown in brackets [ ].

This document has 20 pages. Any blank pages are indicated.

IB23 05_0893_02/5RP
© UCLES 2023 [Turn over
 2

1 This question is about a small mammal called a shrew.

(a) Look at the picture of two shrews from the same species.

Each shrew has a different fur colour.

Fur colour is controlled by genes.

Write down the name of the chemical that makes up genes.

[1]

(b) Eagles feed on shrews.

Scientists sample the population of the shrews living on ground that is dark in colour.

The diagram shows the population of shrews over two years.

The population of shrews for year 3 is not shown.

An eagle feeds on the shrews during years 2 and 3.

eagle

ground that is dark in colour

year 1 year 2 year 3 time

© UCLES 2023 0893/02/A/M/23

 3

(i) The total population size of the shrews is the same during all three years.

Predict the numbers of white shrews and grey shrews in year 3.

Write your prediction in the table.

fur colour number in population in year 3

…………………………

…………………………

[1]

(ii) Describe how natural selection explains the changes in the numbers of white and grey
shrews.

[3]

(iii) The scientists had to trap and release the shrews to get their results.

Write down two safety precautions the scientists took when trapping and releasing the
shrews.

2
[2]

© UCLES 2023 0893/02/A/M/23 [Turn over

 4

2 Look at the diagram showing part of the Periodic Table.

H He

Li Be B C N O F Ne

Na Mg Al Si P S Cl Ar

K Ca transition elements

(a) The electronic structure of lithium is 2.1.

Write down the electronic structure of chlorine.

[1]

(b) Write down the symbol for the atom which has 12 protons in its nucleus.

[1]

(c) Neon is in Group 8 of the Periodic Table.

Neon is an unreactive gas at room temperature.

Argon is also in Group 8.

Suggest one property of argon.

[1]

© UCLES 2023 0893/02/A/M/23

 5

3 Water moves through a plant.

(a) The table shows information about the pathway of water into and out of a plant.

Number 1 is the part where water enters the plant.

Number 5 is the part where water is lost from the plant.

Complete the table by writing the numbers 1, 2, 3, 4 and 5 to show the pathway of water into
and out of a plant.

One has been done for you.

part of plant order of pathway

leaf
5

leaf xylem
....................

root hair cell

....................

root xylem
....................

stem xylem
....................

[1]

(b) Plants lose water from the surface of their leaves.

Write down the name of this process.

[1]

(c) A desert plant grows well due to its very waxy leaves.

High carbon dioxide levels reduce wax production in these plants.

Cars produce carbon dioxide.

Suggest what happens to the population of these desert plants growing near a new road.

[1]

© UCLES 2023 0893/02/A/M/23 [Turn over

 6

4 This question is about waveforms.

(a) Look at the diagram of the waveform of a sound.

Y
Z
time
W in seconds

Which letter shows the amplitude of the sound wave?

Circle the correct answer.

W X Y Z [1]

(b) The waveform for the sound shows several waves.

0 2 4 6 8 time
in seconds

How many complete waves are there in 8 seconds of the waveform?

number of waves [1]

© UCLES 2023 0893/02/A/M/23

 7

(c) The diagrams show how sound A interacts with sound B to make sound C.

waveform of sound A

0 2 4 6 8 time
in seconds

+
waveform of sound B

0 2 4 6 8 time
in seconds

=
waveform of sound C

0 2 4 6 8 time
in seconds

Describe how the waveform of sound A and waveform of sound B interact at:

time = 1 second

time = 3 seconds
[2]

© UCLES 2023 0893/02/A/M/23 [Turn over

 8

5 Look at the diagram of the carbon cycle.

sunlight carbon dioxide in

the atmosphere
combustion

process A
process B
decomposition

feeding

dead plants and animals

fossil fuels

(a) Write down the name of process A.

[1]

(b) Write down the name of process B.

[1]

(c) Write down one similarity between combustion and decomposition.

[1]

(d) Scientists believe that too much carbon dioxide in the atmosphere causes climate change.

Describe two possible effects of climate change.

[2]

© UCLES 2023 0893/02/A/M/23

 9

6 Look at the data about some Group 1 elements.

melting point atomic radius

element
in °C in pm

lithium 181 145

sodium 98 180

potassium 64 220

rubidium 235

(a) Describe the trend in atomic radius as you go down Group 1.

[1]

(b) Predict the melting point of rubidium.

The melting point of rubidium is °C. [1]

(c) Sodium reacts with chlorine to make an ionic solid called sodium chloride.

Sodium chloride has a melting point of 808 °C.

Sodium chloride has a structure.

Name this type of structure.

[1]

7 Write down the names of these electrical symbols.

[2]

© UCLES 2023 0893/02/A/M/23 [Turn over

 10

8 Here are some sentences about the collision theory for the formation of the Moon.

A The less dense rocks eventually merged together to form the Moon.

B This caused very high temperatures and the Earth’s outer layer melted.

C A collision occurred between the Earth and a small planet.

D The less dense rocks were ejected and cooled.

E The dense iron from the cores of both planets merged to create the Earth.

F The less dense rocks were captured by the Earth’s gravitational field.

(a) Put these sentences in the correct order to describe the collision theory.

Two have been done for you.

E F

[3]

(b) In 1969, astronauts went to the Moon and collected rock samples.

Describe how these Moon rock samples provide evidence to support the collision theory.

[1]

(c) Suggest why the density of the Earth is greater than the density of the Moon.

Use ideas from the collision theory in your answer.

[1]

© UCLES 2023 0893/02/A/M/23

 11

9 Scientists estimate one million species of plants and animals are at risk of extinction.

(a) Which factors cause a species to become extinct?

Tick (✓) the two correct factors.

changes in seasons

changes to the environment over time

increased reproduction

new diseases

new food sources

[2]

(b) Explain what is meant by the statement:

‘An animal is at risk of extinction.’

Use ideas about death rate and reproduction rate.

[1]

© UCLES 2023 0893/02/A/M/23 [Turn over

 12

10 Look at the list of metals in order of reactivity.

The most reactive metal is at the top.

calcium

magnesium

zinc
increasing reactivity
iron

copper

silver

A piece of copper is dipped into silver nitrate solution.

Silver is made.

A blue solution of copper nitrate is also made.

(a) What is the name of this type of reaction?

Circle the correct answer.

crystallisation decomposition displacement

filtration neutralisation

[1]

(b) Write the word equation for this reaction.

[1]

© UCLES 2023 0893/02/A/M/23

 13

(c) Look at the list of metals and solutions.

Tick ( ✓) to show if the metal reacts with the solution.

copper + iron nitrate

magnesium + zinc nitrate

silver + magnesium nitrate

iron + zinc nitrate

Explain your answer.

[2]

© UCLES 2023 0893/02/A/M/23 [Turn over

 14

11 Lily investigates which type of insulation is best at reducing the transfer of thermal energy from
hot water.

Look at the diagram of Lily’s experiment.

thermometer

hot water

insulation (cardboard, newspaper or bubble wrap)

glass beaker

bench

Look at her results.

cardboard newspaper bubble wrap

time temperature time temperature time temperature

in seconds in seconds in seconds
0 83 0 85 0 85

60 67 60 81 60 81

120 75 120 79 120 79

180 71 180 76 180 77

240 68 240 72 240 75

300 65 300 68 300 73

(a) The unit of temperature is missing from the tables.

Write down the unit of temperature.

[1]

(b) Calculate the decrease in temperature in the 300 seconds for each beaker.

cardboard

newspaper

bubble wrap
[1]

© UCLES 2023 0893/02/A/M/23

 15

(c) Before the investigation, Lily predicts,

‘Bubble wrap is the best insulator.’

Is her prediction correct?

Explain your answer.

[1]

(d) In one of Lily’s results tables, there is an anomalous result.

Circle the anomalous result in the table.

Give a reason for your answer.

[2]

(e) Lily improves her investigation.

Suggest two improvements Lily makes to her investigation.

[2]

© UCLES 2023 0893/02/A/M/23 [Turn over

 16

12 Mike investigates the reaction between magnesium and dilute hydrochloric acid.

Look at part of the equipment he uses.

dilute hydrochloric acid

magnesium

(a) Write down the name of the equipment Mike uses to collect the gas and measure the
volume of the gas.

[1]

(b) Mike measures the volume of gas made every 30 seconds until the reaction stops.

Describe how Mike makes his results more reliable.

[1]

(c) Mike writes a risk assessment for his investigation.

Write down one safety risk and describe how Mike reduces this risk.

safety risk

how Mike reduces this risk

[2]

© UCLES 2023 0893/02/A/M/23

 17

BLANK PAGE

© UCLES 2023 0893/02/A/M/23 [Turn over

 18

BLANK PAGE

© UCLES 2023 0893/02/A/M/23

 19

BLANK PAGE

Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.

To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge
Assessment International Education Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download
at www.cambridgeinternational.org after the live examination series.

Cambridge Assessment International Education is part of Cambridge Assessment. Cambridge Assessment is the brand name of the University of Cambridge
Local Examinations Syndicate (UCLES), which is a department of the University of Cambridge.

© UCLES 2023 0893/02/A/M/23 [Turn over

 The Periodic Table of Elements

© UCLES 2023
Group
1 2 3 4 5 6 7 8
1 2
H He
hydrogen helium
Key 1 4
3 4 atomic number 5 6 7 8 9 10
Li Be atomic symbol B C N O F Ne
lithium beryllium name boron carbon nitrogen oxygen fluorine neon
7 9 relative atomic mass 11 12 14 16 19 20
11 12 13 14 15 16 17 18

Na Mg Al Si P S Cl Ar
sodium magnesium aluminium silicon phosphorus sulfur chlorine argon
23 24 27 28 31 32 35.5 40
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
potassium calcium scandium titanium vanadium chromium manganese iron cobalt nickel copper zinc gallium germanium arsenic selenium bromine krypton
39 40 45 48 51 52 55 56 59 59 64 65 70 73 75 79 80 84
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
20

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
rubidium strontium yttrium zirconium niobium molybdenum technetium ruthenium rhodium palladium silver cadmium indium tin antimony tellurium iodine xenon
85 88 89 91 93 96 – 101 103 106 108 112 115 119 122 128 127 131
55 56 57–71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86

0893/02/A/M/23
lanthanoids
Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
caesium barium hafnium tantalum tungsten rhenium osmium iridium platinum gold mercury thallium lead bismuth polonium astatine radon
133 137 178 181 184 186 190 192 195 197 201 204 207 209 – – –
87 88 89–103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118
actinoids
Fr Ra Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
francium radium rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium copernicium nihonium flerovium moscovium livermorium tennessine oganesson
– – – – – – – – – – – – – – – – –

57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
lanthanoids La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
lanthanum cerium praseodymium neodymium promethium samarium europium gadolinium terbium dysprosium holmium erbium thulium ytterbium lutetium
139 140 141 144 – 150 152 157 159 163 165 167 169 173 175
89 90 91 92 93 94 95 96 97 98 99 100 101 102 103
actinoids Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
actinium thorium protactinium uranium neptunium plutonium americium curium berkelium californium einsteinium fermium mendelevium nobelium lawrencium
– 232 231 238 – – – – – – – – – – –
 Cambridge Lower Secondary Checkpoint


SCIENCE 0893/02
Paper 2 October 2023
45 minutes

You must answer on the question paper.

No additional materials are needed.

INSTRUCTIONS
• Answer all questions.
• Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
• Write your name, centre number and candidate number in the boxes at the top of the page.
• Write your answer to each question in the space provided.
• Do not use an erasable pen or correction fluid.
• Do not write on any bar codes.
• You should show all your working in the booklet.
• You may use a calculator.

INFORMATION
• The total mark for this paper is 50.
• The number of marks for each question or part question is shown in brackets [ ].

This document has 16 pages.

IB23 10_0893_02/9RP
© UCLES 2023 [Turn over
 2

1 The diagram shows the position of some organs in the human body.

A
D

B
C

(a) Circle the letter of the organ that is part of the human excretory (renal) system.

A B C D [1]

(b) Complete these sentences about the human excretory (renal) system.

The function of the human excretory (renal) system is to the

blood to remove urea.

The urea is then excreted in a liquid called .

[2]

(c) Organs are made of cells.

Cells contain chromosomes.

Name the chemical from which chromosomes are made.

[1]

© UCLES 2023 0893/02/O/N/23

 3

2 Look at the elements in Group 1 from the Periodic Table.

The elements are in the same order as the Periodic Table.

element

lithium

sodium

potassium

rubidium

caesium

francium

(a) Describe how the melting points of the Group 1 elements change down the group.

[1]

(b) Name the most reactive element in Group 1.

[1]

(c) An element in Group 1 reacts with dilute hydrochloric acid.

Circle the gas made in this reaction.

carbon dioxide

chlorine

hydrogen

oxygen

[1]

© UCLES 2023 0893/02/O/N/23 [Turn over

 4

3 Mike holds a metal cup containing water.

hand A

metal cup
containing water

hand B

(a) The water in the metal cup is at a higher temperature than both of his hands.

Describe what happens to the thermal energy in the water.

[1]

(b) Mike pours the water out of the metal cup.

He adds ice and water to the metal cup.

Describe what Mike feels with hand B compared to hand A.

[1]

4 The atoms in a molecule of water are joined together by covalent bonds.

(a) What is a covalent bond?

[2]

(b) The formula for a molecule of ethane is C2H6.

How many atoms are bonded together in one molecule of ethane?

[1]

© UCLES 2023 0893/02/O/N/23

 5

5 Priya compares different sound waveforms.

All the waveforms are drawn to the same scale.

A B

C D

(a) Which two waveforms have the lowest amplitude?

and [1]

(b) Which two waveforms have the lowest frequency?

and [1]

(c) Which two waveforms have the highest pitch?

and [1]

(d) Draw a waveform on the grid with a greater loudness than waveform E.

E
[1]

© UCLES 2023 0893/02/O/N/23 [Turn over

 6

6 Look at the food web for a habitat.

lion

jackal

wild cat

rabbit

owl

small
rodents
green plant
NOT TO SCALE

(a) A disease decreases the number of small rodents in the habitat.

The number of owls decreases but the number of wild cats stays the same.

Complete the sentences to explain why.

The number of owls decreases because

The number of wild cats stays the same because

.
[2]

(b) Explain why green plants need the Sun to survive.

[3]

© UCLES 2023 0893/02/O/N/23

 7

7 An object has volume, mass and density.

The object has a volume of 28 cm3.

The mass of the object is 222 g.

Calculate the density of the object.

g / cm3 [2]

8 The diagram shows part of the Periodic Table.

1 2
H He

3 4 5 6 7 8 9 10
Li Be B C N O F Ne

11 12 13 14 15 16 17 18
Na Mg Al Si P S Cl Ar

19 20
K Ca

(a) Which element in the table has the lowest number of protons in its atom?

[1]

(b) Identify two elements from the table that are in the same period as the element Mg.

and [1]

(c) Name one element from the table that has the same chemical properties as the element Ar.

[1]

© UCLES 2023 0893/02/O/N/23 [Turn over

 8

9 Mia is learning about tectonic plates.

She knows that:

• diverging tectonic plates move away from each other

• converging tectonic plates move towards each other.

(a) Label the diagram.

Choose words from the list.

diverging plates convection currents converging plates

crust mantle

........................................... ........................................... ...........................................

........................................... ........................................... ...........................................

...........................................
...........................................

...........................................
...........................................

[2]

© UCLES 2023 0893/02/O/N/23

 9

(b) Mia joins a map of South America to Africa.

Africa
South
America

Explain why the appearance of the continental coasts is evidence for tectonic plates.

[2]

(c) Write down one other piece of evidence for tectonic plates.

[1]

© UCLES 2023 0893/02/O/N/23 [Turn over

 10

10 Oliver connects a resistor in an electrical circuit.

He measures the current as he increases the voltage across the resistor.

Oliver draws a graph.

current in A

0
0 1 2 3 4 5
voltage in V

(a) Current is measured in A (amps) and voltage is measured in V (volts).

Write down the unit of resistance.

[1]

(b) Calculate the resistance of the resistor.

Include the equation used to calculate resistance in your answer.

resistance = [2]

© UCLES 2023 0893/02/O/N/23

 11

11 Scientists believe that the Moon was formed after a collision between the Earth and another
small planet.

This is called the collision theory for the formation of the Moon.

debris
Earth

small planet

The debris from the collision collected to form the Moon.

(a) Chen collects information about the elements found on the Earth and on the Moon.

percentage of element found on the

element
Earth Moon
oxygen 45.3 44.7
silicon 22.0 22.5
magnesium 2.6 2.3
iron 6.0 8.3
calcium 3.6 3.1

(i) Most of the information supports the collision theory.

Explain how most of this information supports the collision theory.

[1]

(ii) There is a comparison of one element that does not support the collision theory.

Write down the name of this element.

[1]

(b) Suggest two other pieces of evidence Chen collects to support the collision theory.

[2]

© UCLES 2023 0893/02/O/N/23 [Turn over

 12

12 Theories about the structure of the atom have developed over time.

Look at the models of an atom of nitrogen.

model A in 1904 model B in 1914

– electron
–
– – – nucleus
–
+ –
– – –
– –
– –

(a) Describe one similarity between model A and model B.

[1]

(b) Describe one difference between model A and model B.

[1]

(c) Model B is still used today.

Suggest one strength and one limitation of using model B.

strength

limitation

[2]

© UCLES 2023 0893/02/O/N/23

 13

13 Yuri investigates convection.

He adds a drop of red ink to the cold water as shown in the diagram.

red ink
cold water

very
hot
water

(a) Complete the sentence to suggest a testable hypothesis for this investigation.

I predict that the red ink will move

because .
[1]

(b) Complete the table about safety risks and the control of risks in this investigation.

safety risk control of risk

very hot water may burn skin ………………………….………….

………………………….………….

red ink may irritate skin ………………………….………….

………………………….………….

………………………….…………. use plastic beaker instead of glass beaker

………………………….………….

[3]

© UCLES 2023 0893/02/O/N/23 [Turn over

 14

14 Lily investigates variation in tomatoes.

Lily:

• measures the mass of different tomatoes to the nearest whole gram

• classifies the tomatoes into different groups based on their masses.

Lily writes about her results.

There were 3 tomatoes with a mass more than 105 g.

There were 2 tomatoes with a mass between 76 g and 80 g.
There were 6 tomatoes with a mass between 101 g and 105 g.
There were 8 tomatoes with a mass between 86 g and 90 g.
There were 9 tomatoes with a mass between 91 g and 95 g.
There were 12 tomatoes with a mass between 96 g and 100 g.
There were 4 tomatoes with a mass between 81 g and 85 g.

(a) (i) Complete the table of results by writing the:

• unit for the mass range

• number of tomatoes in each mass range.

mass range number of tomatoes

in …………………. in mass range
76 – 80
………………….
81 – 85
………………….
86 – 90
………………….
91 – 95
………………….
96 – 100
………………….
101 – 105
………………….
more than 105
………………….

[2]

© UCLES 2023 0893/02/O/N/23

 15

(ii) What is the best way to present the data in the table?

[1]

(b) Gardeners add nitrates to the soil to help tomato plants grow.

The nitrates are used by the plants to make a substance needed for growth.

Name this type of substance.

[1]

Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.

To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge
Assessment International Education Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download
at www.cambridgeinternational.org after the live examination series.

Cambridge Assessment International Education is part of Cambridge Assessment. Cambridge Assessment is the brand name of the University of Cambridge
Local Examinations Syndicate (UCLES), which is a department of the University of Cambridge.

© UCLES 2023 0893/02/O/N/23 [Turn over

© UCLES 2023
The Periodic Table of Elements
Group
1 2 3 4 5 6 7 8
1 2
H He
hydrogen helium
Key 1 4
3 4 atomic number 5 6 7 8 9 10
Li Be atomic symbol B C N O F Ne
lithium beryllium name boron carbon nitrogen oxygen fluorine neon
7 9 relative atomic mass 11 12 14 16 19 20
11 12 13 14 15 16 17 18

Na Mg Al Si P S Cl Ar
sodium magnesium aluminium silicon phosphorus sulfur chlorine argon
23 24 27 28 31 32 35.5 40
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
potassium calcium scandium titanium vanadium chromium manganese iron cobalt nickel copper zinc gallium germanium arsenic selenium bromine krypton
39 40 45 48 51 52 55 56 59 59 64 65 70 73 75 79 80 84
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
16

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
rubidium strontium yttrium zirconium niobium molybdenum technetium ruthenium rhodium palladium silver cadmium indium tin antimony tellurium iodine xenon

0893/02/O/N/23
85 88 89 91 93 96 – 101 103 106 108 112 115 119 122 128 127 131
55 56 57–71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
lanthanoids
Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
caesium barium hafnium tantalum tungsten rhenium osmium iridium platinum gold mercury thallium lead bismuth polonium astatine radon
133 137 178 181 184 186 190 192 195 197 201 204 207 209 – – –
87 88 89–103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118
actinoids
Fr Ra Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
francium radium rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium copernicium nihonium flerovium moscovium livermorium tennessine oganesson
– – – – – – – – – – – – – – – – –

57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
lanthanoids La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
lanthanum cerium praseodymium neodymium promethium samarium europium gadolinium terbium dysprosium holmium erbium thulium ytterbium lutetium
139 140 141 144 – 150 152 157 159 163 165 167 169 173 175
89 90 91 92 93 94 95 96 97 98 99 100 101 102 103
actinoids Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
actinium thorium protactinium uranium neptunium plutonium americium curium berkelium californium einsteinium fermium mendelevium nobelium lawrencium
– 232 231 238 – – – – – – – – – – –
 Cambridge Lower Secondary Checkpoint


SCIENCE 0893/02
Paper 2 April 2024
45 minutes

You must answer on the question paper.

No additional materials are needed.

INSTRUCTIONS
• Answer all questions.
• Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
• Write your name, centre number and candidate number in the boxes at the top of the page.
• Write your answer to each question in the space provided.
• Do not use an erasable pen or correction fluid.
• Do not write on any bar codes.
• You should show all your working in the booklet.
• You may use a calculator.

INFORMATION
• The total mark for this paper is 50.
• The number of marks for each question or part question is shown in brackets [ ].

This document has 20 pages.

IB24 04_0893_02/5RP
© UCLES 2024 [Turn over
 2

1 This question is about excretion.

Look at the model of the human excretory system.

..........................................
artery

..........................................

..........................................

.......................................... ..........................................

(a) Complete the labels on the model.

Choose words from the list.

bladder

kidney

renal vein

ureter

urethra
[3]

© UCLES 2024 0893/02/A/M/24

 3

(b) The diagrams show the excretory systems of two healthy children.

child A child B

Describe one difference between the excretory systems of child A and child B.

[1]

© UCLES 2024 0893/02/A/M/24 [Turn over

 4

2 Look at the diagrams of models of atoms and ions.

2p
1p 1p 2n

A B

−
+

3p
4n 9p
10n

C D

Key

= electron
p = proton
n = neutron

(a) Which diagram is a model of a molecule?

[1]

(b) Explain why diagram C is a model of a positive ion.

Use ideas about the particles in the ion.

[2]

(c) Which diagram shows a covalent bond?

[1]

(d) Describe what is meant by an ionic bond.

[1]

© UCLES 2024 0893/02/A/M/24

 5

3 Pierre plays the violin.

bow

strings

Pierre moves the bow over the strings on the violin.

The strings vibrate and produce a sound.

(a) Describe what happens to the amplitude when the vibrations are larger.

[1]

(b) The pitch of the sound changes when the strings vibrate more often.

Which word describes the pitch of a sound?

[1]

© UCLES 2024 0893/02/A/M/24 [Turn over

 6

4 This question is about tectonic plates.

The diagram shows the process that causes tectonic plates to move.

tectonic plates

molten magma X
in mantle

(a) Name the process that causes tectonic plates to move.

[1]

(b) Describe what happens to the two tectonic plates at position X.

[1]

5 This question is about density.

The mass of a block of silver is 840 g.

The volume of the block of silver is 80 cm3.

Calculate the density of the block of silver.

Include the unit of density in your answer.

density of block of silver = unit [3]

© UCLES 2024 0893/02/A/M/24

 7

6 This question is about the evidence for tectonic plate movement.

(a) Look at the diagram of a mid-ocean ridge in the sea floor.

mid-ocean ridge
plate boundary

magma

Key
reversed magnetic alignment

normal magnetic alignment

Explain how the diagram shows evidence for tectonic plate movement.

[1]

(b) Describe how the fossil record is evidence for tectonic plate movement.

[1]

© UCLES 2024 0893/02/A/M/24 [Turn over

 8

7 Priya investigates photosynthesis in pondweed.

Look at the diagram of the assembled equipment.

gas syringe

gas bubbles
lamp

pondweed in
water

test-tube ruler

In her first experiment Priya:

• places the lamp 5 cm away from the test-tube

• measures the volume of gas in the gas syringe after 10 minutes.

Priya repeats the experiment several times.

Each time she increases the distance of the lamp from the test-tube.

Look at her table of results.

distance from the lamp volume of gas in gas syringe

in cm in cm3

5 4.0

10 2.0

15 1.0

20 0.5

25 0.2

(a) The gas collected in the gas syringe comes from the pondweed.

What is the name of this gas?

[1]

© UCLES 2024 0893/02/A/M/24

 9

(b) Plot the results on the grid:

• label the x-axis and y-axis

• plot the results
• draw a curve of best fit.

4.0

3.0
...............................................

...............................................
2.0
...............................................

1.0

0
0 5 10 15 20 25

...............................................

...............................................

...............................................

[3]

(c) Describe the relationship between distance from the lamp and volume of gas in the syringe.

[1]

(d) Why do plants need magnesium for photosynthesis?

[1]

© UCLES 2024 0893/02/A/M/24 [Turn over

 10

8 This question is about the interaction of sound waveforms.

(a) Look at the diagram of waveform A.

waveform A

Waveform B and waveform C interact to make waveform A.

Look at the diagram of waveform B.

Draw waveform C that interacts with waveform B to make waveform A.

waveform B

waveform C

[1]

© UCLES 2024 0893/02/A/M/24

 11

(b) Waveform D and waveform E interact and produce waveform F.

waveform D

waveform E

(i) Draw waveform F produced when waveform D and waveform E interact.

waveform F

[1]

(ii) Describe how the loudness of sound waveform F is different from the loudness of sound
waveform D.

[1]

© UCLES 2024 0893/02/A/M/24 [Turn over

 12

9 This question is about extinction and conservation.

(a) The last West African black rhinoceros died in 2011.

Hunting and habitat loss were blamed for the disappearance of this rhinoceros.

Tick () the box that best describes the effect of both hunting and habitat loss on
this rhinoceros.

deforestation

environmental change

inheritance

natural selection

variation

[1]

(b) Scientists try to prevent extinction of species by using conservation.

The chart shows the percentage of endangered species given conservation in three
animal groups.

The level of conservation is described as low, medium or high.

100

90
80

70
60
percentage of 50
endangered species
given conservation 40

30

20

10
0
mammals birds corals
Key
level of conservation animal group
low medium high

© UCLES 2024 0893/02/A/M/24

 13

(i) Which animal group has the greatest level of medium conservation?

[1]

(ii) Endangered species of corals and birds both get the same level of high conservation.

Suggest why endangered species of corals are more likely to become extinct than
endangered species of birds.

Use information from the chart.

[1]

10 This question is about the resistance of a lamp.

The current through the lamp is 5.0 A.

The voltage across the lamp is 2.7 V.

Calculate the resistance of the lamp.

resistance = Ω [2]

© UCLES 2024 0893/02/A/M/24 [Turn over

 14

11 Chen investigates a displacement reaction.

Chen:

• assembles the equipment shown in the diagram

thread
iron powder

copper sulfate solution

before mixing

• measures the mass of the equipment

• tips the equipment so that the iron powder mixes and reacts with the copper sulfate solution
• measures the mass of the equipment after the reaction has finished.

thread

copper
iron sulfate solution

after mixing

(a) Describe how the total mass before mixing compares with the total mass after mixing.

Explain your answer.

[2]

(b) Write the word equation for the reaction.

[1]

© UCLES 2024 0893/02/A/M/24

 15

12 Look at the graph.

The graph shows a prediction about how the sea level will change from its value in the year 2000.

400

300
sea level change
200
in cm

100

0
2000 2050 2100 2150 2200 2250 2300
year

(a) Suggest one reason for the trend in sea level change shown in the graph.

[1]

(b) Suggest one impact of the trend in sea level change shown in the graph.

[1]

© UCLES 2024 0893/02/A/M/24 [Turn over

 16

13 You will need to use the Periodic Table of the Elements on page 20 to answer this question.

Look at the table about some Group 1 elements.

element boiling point in οC

lithium
sodium 883
potassium 760
rubidium 686

(a) Write down the name of one other Group 1 element.

[1]

(b) Predict the boiling point of lithium.

boiling point of lithium = ο

C [1]

(c) Oxygen is an element in Group 6.

Oxygen has a melting point of −218 οC and a boiling point of −183 οC.

What type of structure does oxygen have?

[1]

© UCLES 2024 0893/02/A/M/24

 17

14 Anastasia describes an electrical circuit she makes.

Her circuit contains a battery, a switch, one lamp, a fixed resistor and some wires.

(a) Anastasia says,

‘When I add another lamp to my circuit the brightness

of the first lamp decreases.’

Explain this observation.

Use ideas about:

• the type of circuit

• the current in the circuit.

[2]

(b) Draw the standard electrical symbol for a fixed resistor.

[1]

© UCLES 2024 0893/02/A/M/24 [Turn over

 18

15 This question is about nebulae.

(a) Lily writes statements about how stars are formed from nebulae.

A large clouds of dust and gases collapse

B the core of a star is formed

C gravity brings clouds of dust and gases together

D collapsed material at the centre of the clouds of dust and gases heats up

E the clouds of dust and gases increase in size because of gravity

Put the statements in the correct order.

One has been done for you.

[2]

(b) Circle the word used to describe nebulae that form stars.

galaxies nurseries planets systems [1]

© UCLES 2024 0893/02/A/M/24

 19

16 Ahmed investigates the cooling of water.

In his first experiment he:

• pours some water into a beaker

• measures the initial temperature of the water
• measures the temperature of the water after five minutes.

Ahmed repeats the experiment using a different beaker.

The thermometer diagrams show the final temperatures of the water.

30 qC 30 qC

20 qC 20 qC
beaker 1 beaker 2

(a) Write the final temperatures to the nearest 0.5 °C in the table of results.

starting temperature final temperature temperature change

in °C in °C in °C
beaker 1 36.0

beaker 2 22.5
[2]

(b) Calculate the temperature change in both beakers.

Write your answers in the table of results. [1]

(c) Darker-coloured objects radiate thermal energy more efficiently than lighter-coloured objects.

Ahmed writes a hypothesis using this information.

Complete his hypothesis.

Painting the outside of a beaker of water in a colour will

the heat loss from the water.

[1]

Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.

To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge
Assessment International Education Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download
at www.cambridgeinternational.org after the live examination series.

Cambridge Assessment International Education is part of Cambridge Assessment. Cambridge Assessment is the brand name of the University of Cambridge
Local Examinations Syndicate (UCLES), which is a department of the University of Cambridge.

© UCLES 2024 0893/02/A/M/24 [Turn over

 The Periodic Table of Elements

© UCLES 2024
Group
1 2 3 4 5 6 7 8
1 2
H He
hydrogen helium
Key 1 4
3 4 atomic number 5 6 7 8 9 10

Li Be atomic symbol B C N O F Ne
lithium beryllium name boron carbon nitrogen oxygen fluorine neon
7 9 relative atomic mass 11 12 14 16 19 20
11 12 13 14 15 16 17 18
Na Mg Al Si P S Cl Ar
sodium magnesium aluminium silicon phosphorus sulfur chlorine argon
23 24 27 28 31 32 35.5 40
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
potassium calcium scandium titanium vanadium chromium manganese iron cobalt nickel copper zinc gallium germanium arsenic selenium bromine krypton
39 40 45 48 51 52 55 56 59 59 64 65 70 73 75 79 80 84
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
20

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
rubidium strontium yttrium zirconium niobium molybdenum technetium ruthenium rhodium palladium silver cadmium indium tin antimony tellurium iodine xenon
85 88 89 91 93 96 – 101 103 106 108 112 115 119 122 128 127 131
55 56 57–71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86

0893/02/A/M/24
lanthanoids
Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
caesium barium hafnium tantalum tungsten rhenium osmium iridium platinum gold mercury thallium lead bismuth polonium astatine radon
133 137 178 181 184 186 190 192 195 197 201 204 207 209 – – –
87 88 89–103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118
actinoids
Fr Ra Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
francium radium rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium copernicium nihonium flerovium moscovium livermorium tennessine oganesson
– – – – – – – – – – – – – – – – –

57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
lanthanoids La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
lanthanum cerium praseodymium neodymium promethium samarium europium gadolinium terbium dysprosium holmium erbium thulium ytterbium lutetium
139 140 141 144 – 150 152 157 159 163 165 167 169 173 175
89 90 91 92 93 94 95 96 97 98 99 100 101 102 103
actinoids Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
actinium thorium protactinium uranium neptunium plutonium americium curium berkelium californium einsteinium fermium mendelevium nobelium lawrencium
– 232 231 238 – – – – – – – – – – –