7 H
Mark Scheme
Quick Quiz
Answers Marks
Topic Q1 Q2 Q3 Q4
7Ha D D A B 4
7Hb B C A D 4
7Hc A C B D 4
7Hd A C B D 4
7He D D D A 4
End of Unit Test Mark Scheme Standard (S)
Question Part Step Answer Mark scheme
1 a 3rd it makes it easy to see how the proportions of the 1 mark
gases add up to the whole of the air
b 3rd Any one suitable gas, such as: carbon dioxide, 1 mark – one example
argon, helium, neon.
c 3rd fire extinguishing systems, or any other example 1 mark
related to nitrogen gas being unreactive (inert)
d 2nd A mixture contains two or more different 1 mark – for both parts
substances but a pure substance contains only
one kind of substance.
2 a 1st C solids 1 mark
b 3rd D hydrogen 1 mark
3 a 1st iron and silver 1 mark – for both parts
correct
b 2nd carbon dioxide and water 1 mark – for both parts
correct
4 3rd Any two of: colour change, gas given out, heat 2 marks – 1 mark for
given out, solid formed. each observation or heat
energy change
5 a 4th missing symbols: H and Cu 2 marks – 1 mark for
missing names: magnesium and chlorine both symbols and 1 mark
for both names
b 4th It helps scientists in different countries 1 mark
communicate easily.
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7 H
Mark Scheme
Question Part Step Answer Mark scheme
6 6th a D 2 marks – 1 mark for
b A two correct answers, 2
c B marks for all four correct
answers
d C
7 a 6th calcium carbonate calcium oxide + carbon 2 marks – 1 mark for
dioxide including CO2 as a
product and 1 mark for
the word equation
b 4th B thermal decomposition 1 mark
c 4th calcium carbonate 1 mark
d 4th limewater 2 marks –1 mark for
which turns cloudy as carbon dioxide is bubbled each correct point
through it
8 a 3rd C can be bent without breaking 1 mark
b 4th they conduct electricity; they are ductile/can be 2 marks – 1 mark for
drawn out to form long wires each point
c 4th they are magnetic 1 mark
d 4th metals are extracted from ores/the Earth 2 marks – 1 mark for
there is a limited supply in the Earth or it costs source, 1 mark for one
less to recycle than extract more new metal from correct reason
ore
e 2nd Any two from: low melting point, insulator for heat 1 mark – for any 2
and electricity, brittle when solid, not shiny. correct points
9 a 3rd rock from the Earth that contains useful minerals 1 mark
b 3rd iron, sulfur 1 mark – for both correct
Final Step Calculation
Marks Step
0–4 Below 1st
0–7 1st or below
8–9 2nd
10–11 3rd
12–15 4th
16–21 5th
22–26 6th
27+ 7th
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7 H
Mark Scheme
End of Unit Test Mark Scheme Higher (H)
Question Part Step Answer Mark scheme
1 a 2nd A mixture contains two or more different 1 mark – for both parts
substances but a pure substance contains only
one kind of substance.
b 4th A pie chart makes it easy to see how the 2 marks – 1 mark for each
proportions of the gases add up to the whole of example with its reason, 0
the air. marks for an example
A bar chart makes it easy to compare actual without its reason
percentages for each gas/group.
c 4th fire extinguishing systems, or any other 2 marks – 1 mark for
example related to nitrogen gas being example, 1 mark for
unreactive (inert) inert/unreactive
2 a 4th chemical 2 marks – 1 mark for
because heat is given out during the reaction correct choice, 1 mark for
reason
b 4th iron + sulfur iron sulfide 1 mark
3 a 2nd D heat insulators 1 mark
b 6th In graphite the carbon atoms bond together in 4 marks – 1 mark for each
layers. This makes the substance soft and correct description of
useful in pencils. structure, 1 mark for each
In diamond the carbon atoms bond tightly to relation of property to a
each other in a lattice. This makes diamond use
very hard and useful as a gem/for cutting hard
substances.
4 a 5th Two properties related to heat/cooking food: 2 marks – 1 mark for each
high melting point so can be heated to high property and reason
temperature when cooking without damage
good conductor of heat so heat transferred
quickly to food being cooked in pan.
(Do not accept malleable or strong, as not
relevant to heating.)
b 4th Aluminium is extracted from ore from the 1 mark
ground, which is a limited resource.
5 a 4th metal: copper 1 mark – for all correct
non-metal: carbon, oxygen
b 6th copper carbonate copper oxide + carbon 2 marks – 1 mark for
dioxide including CO2 as a
product and 1 mark for the
word equation
c 4th B thermal decomposition 1 mark
d 4th limewater 2 marks –1 mark for each
which turns cloudy as carbon dioxide is correct point
bubbled through it
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7 H
Mark Scheme
Question Part Step Answer Mark scheme
6 a 6th D 1 mark
bi 7th 1 mark
b ii 7th 1 mark
Final Step Calculation
Marks Step
0–6 2nd or below
7 3rd
8–10 4th
11–15 5th
16–19 6th
20–22 7th
23+ 8th
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7 H
Mark Scheme
Quick Check
Quick Check Answers
7Ha WS 1
Element Abundance (%)
Oxygen 50
Carbon 45
Hydrogen 5
2 a Line should have similar numbers of points on each side of the line.
b As the time of heating increases, the temperature rise increases.
c No, because all the data is quantitative (and not discrete).
7Ha 1 – –
2 – –
3
4 – –
5 – –
6 – –
7 –
8 – –
9
10 – –
11 –
12 – –
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7 H
Mark Scheme
Quick Check Answers
7Hb 1 Agree with a, c, g and i
2 a He
b Ag
3 cannot, different, can
7Hc 1 Metals are good conductors of electricity.
2 Carbon is not a metal.
3 Non-metals are not malleable, are not flexible and are usually brittle.
4 Calcium is a metal.
5 Only certain metals are magnetic (iron, nickel and cobalt).
6 Silver is a metal and is a good conductor of electricity.
7 Mercury is a liquid.
8 Non-metal elements can be liquid (bromine) or solids (e.g. carbon).
9 Metals are found on the left-hand side of the Periodic Table.
10 Metals are good for cooking pots because they are good conductors of heat.
7Hd The missing words from the diagram are: magnet, reaction, compound, sulfur,
heating, iron sulfide.
The missing words from the text are: magnet, joined/bonded, heated, glows,
iron sulfide, iron + sulfur, different, separated, joined/bonded together.
7He Across: 3 reactant; 6 chemical; 8 oxygen; 9 colour; 10 lime; 12 oxides;
15 carbonate; 16 rusting; 17 reaction
Down: 1 thermal; 2 decomposition; 4 dioxide; 5 heat; 7 carbon; 11 silver; 13 sulfur;
14 water
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