DELHI PUBLIC SCHOOL JANKIPURAM, LUCKNOW

SESSION 2024-2025
Subject: Science
Annual Examination
Sample Paper
Class VIII
Time: 3hr M.M- 80

General Instructions:
 This question paper consists of 39 questions in 5 sections.
 All questions are compulsory. However, an internal choice is provided in some questions. A student is
expected to attempt only one of these questions.
 Section A consists of 20 objective type questions carrying 1 mark each.
 Section B consists of 6 Very Short Answer type questions carrying 2 marks each. Answers to these
questions should be in the range of 30 to 50 words.
 Section C consists of 7 Short Answer type questions carrying 3 marks each. Answers to these questions
should be in the range of 50 to 80 words.
 Section D consists of 3 Long Answer type questions carrying 4 marks each. Answer to these questions
should be in the range of 80 to 120 words.
 Section E consists of 3 source-based/case-based units of assessment of 5 marks each with sub-parts.

SECTION A (1x20=20)

I. Multiple choice questions:

1. Fluffy cottony mass found on spoiled bread pieces are:

(a) Bacteria (b) Fungi (c) Virus (d) Protozoa
2. Fire extinguisher-
(a) Cuts off oxygen supply (b) Brings down the temperature of fuel
(b) Both (a) and (b) (d) None of these
3. Where does the fusion of male and female gametes generally take place?
(a) Fallopian tube (b) Ovary (c) Uterus (d) Zygote
4. Malaria Is caused by
(a) Protozoa (b) Virus (c) Algae (d) Bacteria
5. The Scientific study of sound waves is known as
(a) Optics (b) thermodynamics (c) Acoustics (d) Sonics
6. Which of the following is bad conductor of electricity?
(a) Distilled water (b) Silver Nitrate (c) Sulphuric acid (d) Copper sulphate
7. Lightning occurs due to
(a) Rain (b) Wind (c) Electric discharge (d) All of these
8. Thyroxin produced by
(a) Pituitary gland (b) Adrenal gland (c) Thyroid gland (d) Testes
9. Which one shows lateral inversion?
(a) Convex mirror (b) Concave mirror (c) Plane mirror (d) All Plane, Concave and Convex Mirror
10. Atmospheric pressure can be measured by
(a) Manometer (b) Barometer (c) Peizometer (d) Anemometer
11. Where is a coal reserve most likely to be found?
(a) Inside Volcanoes (b) Beneath glaciers (c) On Ocean floors (d) Under land surfaces
12. Non-metals are
(a) Generally solids (b) Generally liquids (c) Generally gases (b) Both (a) & (c)
II. Reframe the following statements by correcting the underline word.
13. Pathogenic micro-organisms present in host cells are killed by antibodies.
14. The speed of sound in air is 300000 km / sec
15. The anode acts as a negative terminal.
16. Coal gas was once used for street lightning in China.

III. Following questions consists of 2 statements. Assertion (A) and Reason (R) choose the most
appropriate option from the options given below:
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is not the correct explanation of A.
c) A is true but the R is false.
d) A is false but R is true.
17. Assertion (A): A Kaleidoscope uses multiple mirrors to create beautiful patterns.
Reason (R): Using repeated reflections, kaleidoscope create maze like patterns.
18. Assertion (A): Water does not play any role in crop production.
Reason(R): Irrigation helps in crop productivity.
19. Assertion (A): It is difficult to carry a bag with narrow straps as compared to carry the same bag with
broader strap.
Reason(R): When the same force acts over a small area its effect is more
20. Assertion (A): Water can be used to extinguish fire caused by electric short circuit.
Reason(R): Water is a poor conductor of electricity.

SECTION B (2 x 6=12)
IV. Very Short Answer Type Questions:
21. How do Vaccine work? Give examples of any two vaccines.
OR
Name the bacteria responsible for fixing nitrogen and name the first antibiotic discovered.
22. Write one point of difference between Viviparous and Oviparous animals along with one example
for each.
23. What is static charge? How does it different from electric charge?
24. What is Metaphorphosis? Explain
25. Write any two safety measures to be taken during lightning and thunderstorm.
26. Differentiate between menarche and menopause.

SECTION C (3 x 7=21)
V. Short Answer Type Questions
27. a) Name any two soft metals which can be cut with a knife?
b) What happens when sodium bi carbonate reacts with sulphuric acid?
c) Write the chemical formula of Rust.
28. a) Calculate the pressure exerted by a force of 870 N acting on an area ofn3.0 m2.
b) Write any two effects of force with one example of each.
29. What is Destructive Distillation of coal? Write the byproducts obtained in the process. List one use of
each of them.
30. Explain briefly about any three methods of charging a body.
31. List changes in the body that take place at puberty?
OR
Write any one function of hormone secreted by the pituitary gland and thyroid gland.
32. What is electroplating? Explain the process with the help of an activity along with chemical
equations taking place at Anode and Cathode.
33. What is ‘in vitro fertilization’ technique of reproduction?
 SECTION D (4 x 3 =12)
VI. Long Answer Type Questions
34. Draw a systematic diagram of nitrogen cycle and explain it.
OR
What are harmful microorganisms? Explain by giving the example of two disease-carrying
microbes.
35. a) How can water boil in a paper cup without burning the paper?
b) List any two essential requirements for producing fire.
c) Classify the following as combustible and non-combustible substances:
charcoal, stone, steel, diesel,
OR
Give Reasons-
a) LPG is a better domestic fuel than wood.
b) Water is not used to control fires involving electrical equipment.
c) How is CO2 able to control fire.

36. Write the functions of the following parts of the eye.

Iris, Ciliary muscles, Retina, Optic nerve

SECTION-E (5 x 3 =15)
37. A chemical process in which a substance reacts with oxygen to give off heat is called combustion. The
substance that undergoes combustion is said to be combustible. It is also called a fuel. Sometimes, light
is also given off during combustion, either as a flame or as a glow. The substances which have very low
ignition temperature can catch fire easily.

1. Fuels can be
a) Solids only b) liquids only c) Gases only d) All of these
2. What is ignition temperature?
a) Lowest temperature at which a substance catches fire.
b) Temperature at which water boils.
c) Temperature at which ice is formed.
d) Temperature of LPG.
3. Identify the inflammable substance from the following.
a) Soil b) Water c) Alcohol d) Vinegar
4. What are inflammable substances?
a) Substances with low ignition temperature
b) Substances which catches fire easily with a flame
c) Only (a)
d) Both (a) & (b)
5. Name the secondary fuel which provides us water gas and producer gas.
a) Coal b) Coke c) Lignite d) Bituminous

38. A boy named Yash from Gwalior who studies in 8th standard is very fond of plants. He has a small
garden in the backyard. Where he’s planted many small plants and takes good care of them. He
regularly waters all the plants and uses fertilizers on them to keep them healthy. One day, a small
announcement was made in school. In summer vacations, every student needs to do a project
according to his/her own interest. Yash decided to grow a plant during summers and present it in
front of the whole class as his project. Yash decided to grow peas. So he went to the market and
bought the best quality seeds, sand and fertilizers. He came back home, went to the backyard and
planted the seed. Started taking good care of it. But as day passed he began to realise that the seeds
he planted are getting worse. The plant was unhealthy and very poor in quality. He tried everything
but was unable to figure out the solution.

a) Rabi crops are grown in which period?

b) Which system is used for irrigation?
 c) Why Yash’s crops were grown unhealthy?
d) What are the disadvantages of fertilisers?
e) Name any two fertilizers.

39. a) What is the frequency of a vibrating body whose time-period is 0.05 second? [2]
b) By how much will the loudness of a sound change when the amplitude of vibrations is:
(a) Doubled? (b) Halved? [2]
c) How is pitch related to frequency? [1]
OR
State one observation from everyday life which shows that sound travels slower than light.