Class 8 Question Paper 2024-25 Science (Mid Term)

MID-TERM EXAMINATION

Question Paper
2024-25
NCERT BASED SYLLABUS

FOR CBSE AND STATE BOARD
FOLLOWING NCERT

Mid Term Exam Question Paper 2024-25

MID-TERM EXAMINATION
SESSION: 2024-2025
SUBJECT: SCIENCE
CLASS – VIII
Time Allowed: 3 Hrs 15 Mins Max. Marks: 80
General Instructions:

1. This question paper consists of 39 questions in 5 sections.
2. All questions are compulsory. However, an internal choice is provided in some questions.
A student is expected to attempt only one of these 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. Answers to these
questions should be in the range of 30 to 50 words.
5. 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.
6. Section D consists 03 Long Answer type questions carrying 5 marks each. Answer to
these questions should be in the range of 80 to 120 words.
7. Section E consists of 3 source-based/case-based units of assessment of 4 marks each with
sub-parts.
8. This question paper consists of 5 printed pages.

______________________________________________________________________

SECTION A (1X20=20)
1. When coal burns in air then
a. Carbon dioxide is formed b. Sulphur dioxide is formed
c. Carbon monoxide is formed d. Hydrogen gas is formed
2. Coal tar contains about
a. 300 substance b. 400 substance c. 200 substance d. 100 substance
3. Burning of charcoal in a closed room will produce
a. Carbon dioxide b. Nitrogen dioxide c. Carbon monoxide d. All of these
4. CNG and LPG are the examples of
a. Solid fuels b. Liquid fuels c. Gaseous fuels d. They are not fuels
5. Ignition temperature is
a. Lowest temperature at catch fire b. Higher temperature at catch fire

c. Any temperature d. None of these
6. Lichen shows the following mode of nutrition:
(a) Saprophytic (b) Parasitic (c) Symbiotic (d) Holozoic
7. The disease caused by a protozoan and spread by an insect is _________.
(a) dengue (b) polio (c) malaria (d) measles
8. Amoeba belongs to (a) Algae (b) Fungi (c) Protozoa (d) Virus

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9. Paddy and Maize belong to
(a) Rabi Crops (b) Kharif Crops (c) Zaid Crops (d) None of these
10. What is the unit of force?
(a) Newton (N) (b) Joule (J) (c) Pascal (Pa) (d) Meter (m)
11. Which of the following is an example of frictional force?
(a) Gravity (b) Electromagnetic force (c) Normal force (d) Applied force
12. What is the formula to calculate pressure?
(a) Pressure = Force / Area (b) Pressure = Area / Force
(c) Pressure = Force x Area (d) Pressure = Area x Force
13. Which type of friction occurs when an object is rolling?
(a) Static friction (b) Kinetic friction (c) Rolling friction (d) Fluid friction
14. What is the unit of sound frequency?
(a) Hertz (Hz) (b) Decibel (dB) (c) Newton (N) (d) Meter (m)
15. Which of the following is a characteristic of sound waves?
(a) Transverse waves (b) Longitudinal waves
(c) Electromagnetic waves (d) Mechanical waves
16. A book left on a table goes through
(a) Rolling Friction (b) Static Friction (c) Sliding Friction (d) None of these
Instruction for Question No. 17-20:
(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of
assertion (A).
(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of
assertion (A)
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.
17. Assertion (A): Bacteria are harmful for curd.
Reason (R): Milk is converted into curd by Lactobacillus.
18. Assertion (A): The loosening of soil allows the roots to breathe easily.
Reason (R): The loosened soil helps in the growth of earthworms and microbes present in
the soil. These organisms are friends of the farmer since they further turn and loosen the soil
and add humus to it.
19. Assertion (A): Water is commonly used to control fire.
Reason (R): Any fire can be extinguished with water.
20. Assertion(A): A force can change the shape of an object.
Reason(R): A force can only change the motion of an object, not its shape.

SECTION-B (2X6=12)
21. Which one is a better fuel between LPG and wood - explain?
22. Write down 2 differences between coal gas and petroleum gas.
23. Match the microorganisms given in the Column A to the group to which they belong in

Column B
Column A Column B
(a) Lactobacillus (i) Algae
(b) Penicillium (ii) Protozoa
(c) Chlamydomonas (iii) Fungi
(d) Plasmodium (iv) Bacteria

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24. If you are given a dry piece of land for cultivation what will you do before sowing the
seeds?
OR
State whether the following statements are true or false. Correct the false statements:
(a) Growing different crops in different seasons in the same field will deplete the soil of
nutrients.
(b) Freshly harvested grains must be dried before storing.
25. Camel can navigate sand with ease. Cite a cause.
26. Why can’t a pencil make a mark on glass?
OR
Why does your teacher supposed to speak one at a time rather than all at once?
SECTION-C (3X7=21)
27. Write down 3 characteristics of a good fuel.
28. Write down 3 judicious ways to use fossil fuels.
OR
Why isn’t hydrogen gas used as a domestic or industrial fuel, although it has a very high calorific
value? State three reasons for the answer.
29. (a) What is food poisoning? (1)
(b) Write the names of one natural preservative and one chemical preservative. (2)

30. (a) Write the names of two sources of irrigation. (1)
(b) Write two differences between Fertilizer and Manure. (2)
31. (a) Name one commercial use of yeast. (1)
(b) Why should we avoid standing close to a tuberculosis patient while he/she is coughing? (2)
32. Define Amplitude, Wavelength and Frequency.
OR
Two women are of the same weight. One wears sandals with pointed heels while the other
wears sandals with flat soles. Which one would feel more comfortable while walking on a
sandy beach? Give reasons for your answer.

33. Observe the vessels A, B, C and D shown in Fig.11.10 carefully.

The volume of water taken in each vessel is as shown. Arrange them in the order of decreasing
pressure at the base of each vessel. Explain

Page 3 of 5

SECTION-D (5X3=15)
34. Draw a neat diagram of a flame and explain each zone? [3+2]
OR
Describe fractional distillation of petroleum with a proper diagram. Write 1 uses of any three
substances we obtained from it. [3+2]
35. (a) How do vaccines work? (2)
(b) What will happen to the cooked rice if it is kept in the open humid and warm weather
for a day or two? (2)
(c) What will happen if you eat the same rice? Provide reason for your answer. (1)
OR
(a) What is Nitrogen Fixation? (1)
(b) Draw and describe the Nitrogen Cycle. (4)
36. Draw the diagram of human ear and label at least 5 parts and write the working procedure
of human ear.
OR
(a) It is impossible to eliminate friction. Cite your comment in support of the statement. (2)
Write 3 factors on which friction depends. (1)
2
(b) A force of 121 N applied over an area of 1.1 m produces a pressure of how many Pascal? (2)
SECTION-E (4X3=12)
37. Radhey prefers to go to school by pooling car. On other occasions he like to opt for public
transport rather than private transport. For short distances, he walks or uses bicycle.
(a) What are the benefits of carpooling? (2)
(b) Which mean of transport do you think is best for short distances? (1)
(c) How on our end we can reduce the consumption of fossil fuels? (1)
38.

Study the image and answer the following questions:
(a) Write the name of the disease. (1)
(b) Write the name of the causal organism of this disease. (1)
Page 4 of 5

(c) Name any one plant disease (except from the one shown in the picture) and the
microorganism that causes the disease. (1+1)
OR
How does the disease spread from one plant to another? (2)
39. Friction is a force between two surfaces that are sliding, or trying to slide, across each other.
Friction always works in the direction opposite to the direction in which the object is moving, or
trying to move. It always slows a moving object down.

Friction also produces heat. If you rub your hands together quickly, you will feel them get
warmer. Friction can be a useful force because it prevents our shoes slipping on the pavement
when we walk and stops car tyres skidding on the road. When you walk, friction is caused
between the tread on shoes and the ground. This friction acts to grip the ground and prevent
sliding. Sometimes we want to reduce friction. For example, we use oil to reduce the friction
between the moving parts inside a car engine. In many machines, friction is reduced by using ball
bearings. The reduced friction means there is less wear on the moving parts and less heat
produced.

i)When does friction arise?
ii) Why should we apply oil on the hinges of the door?
iii) Gymnasts apply some coarse substance on their hands. Why?
iv) Explain why sportsmen use shoes with spikes.

Page 5 of 5

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