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VARDAAN LEARNING INSTITUTE

MOCK TEST SERIES - SCIENCE (2025-26)
CLASS: VIII SUBJECT: SCIENCE
TIME: 3 HOURS MAX. MARKS: 80
General Instructions:
  1. The question paper consists of 39 questions in 5 sections.
  2. All questions are compulsory. However, an internal choice is provided in some questions.
  3. Section A consists of 20 objective type questions carrying 1 mark each.
  4. Section B consists of 6 Very Short questions carrying 2 marks each.
  5. Section C consists of 7 Short Answer type questions carrying 3 marks each.
  6. Section D consists of 3 Long Answer type questions carrying 5 marks each.
  7. Section E consists of 3 Source-based/Case-based units of assessment of 4 marks each with sub-parts.
SECTION A (20 MARKS)
1.
Khraif crops are sown in:
(a) March, April (b) June, July (c) October, November (d) January, February
1
2.
The disease caused by a protozoan and spread by an insect is:
(a) Dengue (b) Malaria (c) Polio (d) Measles
1
3.
Which of the following is obtained from coal tar?
(a) Petrol (b) Coke (c) Naphthalene balls (d) None of these
1
4.
Rapid combustion occurs when a substance:
(a) burns slowly without external heat (b) burns typically with external heat producing heat and light (c) explodes suddenly (d) catches fire on its own
1
5.
The species of plants and animals which are found exclusively in a particular area are called:
(a) Endemic species (b) Extinct species (c) Endangered species (d) Flora and Fauna
1
6.
Which of the following undergoes metamorphosis?
(a) Human (b) Amoeba (c) Silkworm (d) Hydra
1
7.
The first menstrual flow begins at puberty and is termed as:
(a) Menopause (b) Menstruation (c) Menarche (d) Maturation
1
8.
A force of 10 N acts on an area of 0.1 m². The pressure exerted is:
(a) 1 Pa (b) 10 Pa (c) 100 Pa (d) 1000 Pa
1
9.
Which of the following surfaces produces the least friction?
(a) Carpet (b) Glass (c) Sandpaper (d) Gravel road
1
10.
Sound travels fast in:
(a) Solids (b) Liquids (c) Gases (d) Vacuum
1
11.
An electrode connected to the positive terminal of a battery is called:
(a) Anode (b) Cathode (c) Cation (d) Anion
1
12.
Which of the following is not a natural phenomenon?
(a) Earthquake (b) Cyclone (c) Lightning (d) Earthing
1
13.
The image formed by a plane mirror is:
(a) Virtual, behind the mirror and enlarged (b) Virtual, behind the mirror and of the same size (c) Real, at the surface of the mirror and enlarged (d) Real, behind the mirror and of the same size
1
14.
Red Data Book contains a record of:
(a) Extinct species (b) Flora (c) Fauna (d) Endangered species
1
15.
Which of the following is an example of a weedicide?
(a) 2,4-D (b) NPK (c) Urea (d) Superphosphate
1
16.
Burning of coal results in the release of:
(a) Carbon dioxide (b) Sulphur dioxide (c) Nitrogen dioxide (d) All of these
1
17.
Cells which lack a nuclear membrane are called:
(a) Eukaryotic cells (b) Prokaryotic cells (c) Single cells (d) Multi cells
1
18.
The loudness of sound depends on:
(a) Amplitude (b) Frequency (c) Time period (d) Speed
1
19.
Visually impaired persons can read and write using:
(a) Electronic aids (b) Braille system (c) Hearing aids (d) Optical aids
1
20.
The chemical used to check the growth of microorganisms in food is:
(a) Sodium bicarbonate (b) Sodium benzoate (c) Sodium carbonate (d) Sodium chloride
1
SECTION B (12 MARKS)
21.
Define sowing. Name the tool used for sowing seeds traditionally.
2
22.
What are the advantages of using manure? (Any two)
2
23.
Explain why fossil fuels are exhaustible natural resources.
2
24.
Give two examples of situations in which applied force causes a change in the shape of an object.
2
25.
Explain why objects moving in fluids must have special shapes.
OR
What is fluid friction? On what factors does it depend?
2
26.
What is electroplating? Giving a suitable example.
2
SECTION C (21 MARKS)
27.
Describe the characteristics and uses of coke.
3
28.
Make a labelled diagram of a candle flame.
3
29.
What are the causes and consequences of deforestation?
3
30.
Explain the difference between asexual and sexual reproduction.
OR
Describe the process of binary fission in Amoeba with the help of a diagram.
3
31.
List changes in the body that take place at puberty. (Any three)
3
32.
A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.
3
33.
What is an earthquake? What happens when it occurs? Explain what are the main causes?
3
SECTION D (15 MARKS)
34.
(a) What are microorganisms? Name the four major groups.
(b) How do microorganisms help in cleaning the environment?
OR
(a) Explain the nitrogen cycle with a schematic diagram.
(b) Name the bacterium found in the root nodules of leguminous plants.
5
35.
(a) State the laws of reflection.
(b) Draw a labelled diagram showing the reflection of light from a plane mirror.
(c) What are the characteristics of the image formed by a plane mirror?
5
36.
(a) What is friction? Clearly state two advantages and two disadvantages of friction.
(b) Why do we use ball bearings in machines?
5
SECTION E: CASE BASED QUESTIONS (12 MARKS)
37.
Case Study 1: Sound
Sound is a form of energy that produces a sensation of hearing in our ears. It is produced by vibrating bodies. Sound needs a medium for propagation. It cannot travel in a vacuum.
Based on the above information, answer the following:
(i) Name the organ in humans which produces sound. (1)
(ii) How is sound produced in the human voice box? (1)
(iii) Why is the voice of men different from that of women? (2)
4
38.
Case Study 2: Chemical Effects
The passage of an electric current through a conducting liquid causes chemical reactions. The resulting effects are called chemical effects of currents.
Based on the above information, answer the following:
(i) Define electrolysis. (1)
(ii) Name the gas evolved at the positive electrode when electric current is passed through water. (1)
(iii) What is electroplating? Give one application. (2)
4
39.
Case Study 3: Light
Light is a form of energy that enables us to see things. Reflection is the bouncing back of light into the same medium when it strikes a surface.
Based on the above information, answer the following:
(i) What is the angle of incidence if the angle of reflection is 45 degrees? (1)
(ii) What happens to a ray of light which falls normally on a plane mirror? (1)
(iii) State the two laws of reflection. (2)
4
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