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VARDAAN LEARNING INSTITUTE

MOCK TEST SERIES - V (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 is used for cutting and gathering of crops?
(a) Plough (b) Hoe (c) Combine (d) Seed Drill
1
2.
Which of the following diseases is caused by a virus?
(a) Typhoid (b) Polio (c) Tuberculosis (d) Cholera
1
3.
Naphthalene balls used to repel moths and other insects are obtained from:
(a) Coal gas (b) Coal tar (c) Coke (d) Petroleum
1
4.
The calorific value of a fuel is expressed in the unit:
(a) Kilojoule per kg (kJ/kg) (b) Kilojoule (kJ) (c) Watt (W) (d) Kilogram (kg)
1
5.
Which of the following is NOT a part of the female reproductive system in humans?
(a) Ovary (b) Uterus (c) Vas deferens (d) Oviduct
1
6.
The first menstrual flow begins at puberty and is termed:
(a) Menopause (b) Menstruation (c) Menarche (d) Ovulation
1
7.
An earthquake of magnitude 6 on the Richter scale has how much more destructive energy than an earthquake of magnitude 4?
(a) 2 times (b) 100 times (c) 1000 times (d) 20 times
1
8.
Voice of which of the following is likely to have the minimum frequency?
(a) Baby girl (b) Baby boy (c) A man (d) A woman
1
9.
The process of transferring charge from a charged object to the earth is called:
(a) Earthing (b) Lightning (c) Discharging (d) Grounding
1
10.
To hear a distinct echo, the time interval between the original sound and the reflected one must be at least:
(a) 0.2 s (b) 1 s (c) 0.1 s (d) 0.01 s
1
11.
Which of the following is a good conductor of electricity?
(a) Distilled water (b) Tap water (c) Kerosene (d) Honey
1
12.
Visually impaired persons can read and write using:
(a) Electronic aids (b) Braille system (c) Audio cassettes (d) Visual aids
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 as the object (c) Real, at the surface of the mirror and enlarged (d) Real, behind the mirror and of the same size as the object
1
14.
Species found exclusively in a particular area are called:
(a) Endangered species (b) Extinct species (c) Endemic species (d) Migratory species
1
15.
Which hormone is responsible for the development of secondary sexual characters in females?
(a) Testosterone (b) Estrogen (c) Adrenaline (d) Thyroxine
1
16.
A tester is used to check the conduction of electricity through two liquids, Labelled A and B. It is found that the bulb glows brightly for liquid A while it glows very dimly for liquid B. You would conclude that:
(a) liquid A is a better conductor than liquid B (b) liquid B is a better conductor than liquid A (c) both liquids are equally conducting (d) conducting properties of liquids cannot be compared in this manner
1
17.
Which of the following is NOT a consequence of deforestation?
(a) Increase in the temperature of the earth (b) Increase in the level of carbon dioxide (c) Decrease in ground water level (d) Increase in rainfall
1
18.
Above what loudness level does sound become physically painful?
(a) 30 dB (b) 60 dB (c) 80 dB (d) 100 dB
1
19.
The phenomenon of multiple reflection is used in:
(a) Periscope (b) Kaleidoscope (c) Simple microscope (d) Telescope
1
20.
Rhizobium bacteria are found in the root nodules of:
(a) Cereal crops (b) Leguminous crops (c) Horticultural crops (d) None of these
1
SECTION B (12 MARKS)
21.
Why is sodium stored in kerosene?
2
22.
Name two organelles found in plant cells but not in animal cells.
2
23.
Define asexual reproduction. Name two methods of asexual reproduction in animals.
2
24.
State the function of the retina in the human eye.
2
25.
Explain why water is not used to extinguish fires involving electrical equipment.
OR
What are the three essential requirements for producing fire?
2
26.
What is the Red Data Book?
2
SECTION C (21 MARKS)
27.
Describe the 'Greenhouse Effect'. Name the gas mainly responsible for it.
3
28.
Explain the difference between a zygote and a foetus.
OR
Draw a labelled diagram of the human sperm.
3
29.
(a) What is Adam's apple?
(b) Why does the voice of boys become hoarse during puberty?
3
30.
Describe an activity to show that sound needs a medium for propagation.
3
31.
Explain the mechanism of lightning formation.
3
32.
Explain why LEDs are preferred over electric bulbs in testing conduction of liquids.
3
33.
What is irrigation? Describe two methods of irrigation which conserve water.
3
SECTION D (15 MARKS)
34.
(a) Differentiate between Prokaryotic and Eukaryotic cells.
(b) Draw a diagram of a plant cell and label: Cell wall, Chloroplast, Vacuole.
OR
(a) State the function of the following: (i) Mitochondria (ii) Ribosomes (iii) Nucleus.
(b) Why are cells called the structural and functional unit of life?
5
35.
(a) What are the laws of reflection?
(b) Describe an activity to show that the incident ray, the reflected ray and the normal all lie in the same plane.
(c) How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 40 cm?
5
36.
(a) What is meant by electroplating?
(b) Draw a circuit diagram to show electroplating of copper on an iron spoon.
(c) State two uses of electroplating in daily life.
5
SECTION E: CASE BASED QUESTIONS (12 MARKS)
37.
Case Study 1: Food Preservation
Food spoils when microorganisms grow on it. Spoiled food emits bad smell and has a bad taste and changed colour. We use various methods to preserve food. Common salt, sugar, oil and vinegar are used as preservatives. Pasteurization is used for milk.
Based on the above information, answer the following:
(i) Name the chemicals generally used to check the growth of microorganisms. (1)
(ii) How does sugar prevent food spoilage? (1)
(iii) Explain the process of Pasteurisation. (2)
4
38.
Case Study 2: Sound and Hearing
We hear sound through our ears. The outer ear is like a funnel. Sound enters it and travels down a canal to the eardrum. The eardrum vibrates and sends signals to the inner ear, and finally to the brain.
Based on the above information, answer the following:
(i) What is the scientific name for the eardrum? (1)
(ii) What is the function of the auditory nerve? (1)
(iii) How does the eardrum help in hearing? (2)
4
39.
Case Study 3: Coal and Petroleum
Coal and petroleum are fossil fuels. They are exhaustible natural resources. Burning of these fuels causes air pollution and global warming. We should use them judiciously. PCRA advises people on how to save petrol/diesel while driving.
Based on the above information, answer the following:
(i) Expand PCRA. (1)
(ii) Name the product of coal used for manufacturing metals. (1)
(iii) Suggest two tips given by PCRA to save petrol/diesel. (2)
4
CREATED BY TEAM VARDAAN