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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.
Which of the following agricultural practices is done for replenishing the soil with nutrients?
(a) Sowing (b) Irrigation (c) Crop Rotation (d) Weeding
1
2.
The process of conversion of sugar into alcohol is called:
(a) Nitrogen fixation (b) Moulding (c) Fermentation (d) Infection
1
3.
Which of the following is an exhaustible natural resource?
(a) Air (b) Sunlight (c) Coal (d) Water
1
4.
The substance which has a very low ignition temperature and can easily catch fire with a flame is called:
(a) Combustible substance (b) Inflammable substance (c) Hazardous substance (d) Non-combustible substance
1
5.
Which part of the cell contains organelles?
(a) Nucleus (b) Cytoplasm (c) Cell membrane (d) Cell wall
1
6.
The stage of the embryo in which all the body parts can be identified is called:
(a) Foetus (b) Zygote (c) Infant (d) Egg
1
7.
The change from larva to adult is called:
(a) Metabolism (b) Metamorphosis (c) Metastasis (d) Morphology
1
8.
The pressure exerted by a liquid:
(a) decreases with depth (b) does not change with depth (c) increases with depth (d) is different in different directions at the same depth
1
9.
Which of the following is NOT a method to reduce friction?
(a) Lubricating (b) Polishing (c) Using ball bearings (d) Making the surface rough
1
10.
The pitch of sound depends on its:
(a) Frequency (b) Amplitude (c) Speed (d) Loudness
1
11.
Which of the following solutions will not conduct electricity?
(a) Lemon juice (b) Vinegar (c) Tap water (d) Vegetable oil
1
12.
Which of the following cannot be charged easily by friction?
(a) A plastic scale (b) A copper rod (c) An inflated balloon (d) A woollen cloth
1
13.
The splitting of white light into seven colours is called:
(a) Dispersion (b) Reflection (c) Refraction (d) Rectilinear propagation
1
14.
Migratory birds fly to far away places because of:
(a) climatic changes (b) shortage of food (c) earthquakes (d) shortage of water
1
15.
Adolescents should be careful about what they eat, because:
(a) proper diet develops their brains (b) proper diet is needed for the rapid growth taking place in their body (c) adolescents feel hungry all the time (d) taste buds are well developed in teenagers
1
16.
Force acting on a unit area is called:
(a) Friction (b) Pressure (c) Gravity (d) Thrust
1
17.
Which of the following is a contact force?
(a) Electrostatic force (b) Magnetic force (c) Frictional force (d) Gravitational force
1
18.
Sound cannot travel through:
(a) Water (b) Air (c) Iron (d) Vacuum
1
19.
The process of depositing a layer of any desired metal on another material by means of electricity is called:
(a) Electrolysis (b) Electroplating (c) Electrorefining (d) Electromagnetism
1
20.
Which part of the eye controls the amount of light entering into it?
(a) Iris (b) Cornea (c) Lens (d) Retina
1
SECTION B (12 MARKS)
21.
Explain how fertilizers are different from manure. (Any two points)
2
22.
Define ignition temperature. Why does a matchstick not catch fire on its own at room temperature?
2
23.
What are the advantages of using CNG and LPG as fuels?
2
24.
What is the difference between internal fertilization and external fertilization?
2
25.
State the laws of reflection.
OR
What is lateral inversion?
2
26.
Explain why sliding friction is less than static friction.
2
SECTION C (21 MARKS)
27.
Describe the nitrogen cycle with the help of a schematic diagram description.
3
28.
What are the major groups of microorganisms? Name the group which contains only unicellular organisms.
OR
Explain three uses of microorganisms in our daily lives.
3
29.
Explain the formation of petroleum.
3
30.
What is deforestation? List any two natural and two man-made causes of deforestation.
3
31.
(a) What is audible sound? What is its range for human ears?
(b) What is noise pollution?
3
32.
(a) Draw a sketch to show the reflection of light from a plane mirror.
(b) Differentiate between regular and diffused reflection.
3
33.
Explain the structure of a flame with a diagrammatic description.
3
SECTION D (15 MARKS)
34.
(a) Define force. State its SI unit.
(b) Explain any three effects of force with examples.
OR
(a) Differentiate between contact and non-contact forces.
(b) A blacksmith hammers a hot piece of iron while making a tool. How does the force due to hammering affect the piece of iron?
5
35.
(a) What are sex hormones? Why are they named so?
(b) Explain the role of hormones in completing the life history of insects and frogs.
(c) Name the endocrine gland that produces insulin.
5
36.
(a) Describe the construction and working of an electroscope.
(b) List three safety measures to be taken during a thunderstorm.
5
SECTION E: CASE BASED QUESTIONS (12 MARKS)
37.
Case Study 1: Conservation
Protected areas like wildlife sanctuaries, national parks, and biosphere reserves are earmarked to protect our flora and fauna. In these areas, activities like plantation, cultivation, grazing, felling trees, hunting, and poaching are prohibited.
Based on the above information, answer the following:
(i) Define a Biosphere Reserve. (1)
(ii) How is a zoo different from a wildlife sanctuary? (1)
(iii) Why are endemic species particularly vulnerable to extinction? (2)
4
38.
Case Study 2: Friction
Friction is a necessary evil. In some situations, it is useful, while in others, it is harmful. We intentionally increase friction in some cases (like tires) and reduce it in others (using lubricants).
Based on the above information, answer the following:
(i) Why are the soles of shoes grooved? (1)
(ii) Why do gymnasts apply some coarse substance on their hands? (1)
(iii) Explain why objects moving in fluids must have special shapes. What is this shape called? (2)
4
39.
Case Study 3: Chemical Effects
When electric current is passed through a conducting solution, some chemical reactions take place. This is known as the chemical effect of electric current. A common application of this effect is electroplating.
Based on the above information, answer the following:
(i) Name two metals that are commonly used for electroplating. (1)
(ii) Why is chromium plating done on car parts and taps? (1)
(iii) In the process of electroplating copper on an iron spoon, to which terminal of the battery should the iron spoon be connected? Explain why. (2)
4
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