Class 7 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-VII

Time Allowed: 3Hrs 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 4 printed pages.

______________________________________________________________________________

SECTION-A (1X20=20)
1. Products of a neutralization reaction are always
(a) an acid and a base (b) an acid and a salt (c) a salt and water (d) a salt and a base
2. Turmeric is a natural indicator. On adding its paste to acid and base separately, which colors
would be observed?
(a) Yellow in both acid and base (b) Yellow in acid and red in base
(c) Pink in acid and yellow in base (d) Red in acid and blue in base
3. Which of the following sets of substances contains acids?
(a) Grapes, lime water (b) Vinegar, soap (c) Curd, milk of magnesia (d) Curd, vinegar
4. Which of the following is a physical change?

(a) Rusting of iron (b) Combustion of magnesium ribbon
(c) Burning of candle (d) Melting of wax
5. A chemical change may involve
(a) change in colour only (b) change in temperature only
(c) evolution of gas only (d) All of the above

Page 1 of 4

6. A man painted his main gate made up of iron, to
(a) prevent it from rusting. (b) protect it from the sun.
(c) make it look beautiful. (d) make it dust free.
7. ______________ respiration takes place in presence of oxygen.
8. Saliva is secreted in the mouth by ______________.
9. Water from undigested food is absorbed mainly in the –
(a) stomach (b) food pipe (c) small intestine (d) large intestine
10. In cockroaches air enters the body through –
(a) lungs (b) gills (c) spiracles (d) skin
11. What is breathing rate?
12. What are heterotrophs?
13. What is the process of transfer of heat energy from one body to another called?
(a) Conduction (b) Convection (c) Radiation (d) Heat transfer
14. Which of the following materials is a good conductor of heat?
(a) Wood (b) Metal (c) Plastic (d) Glass
15. What is the distance traveled by an object in a given time called?
(a) Speed (b) Velocity (c) Displacement (d) Distance
16. What is the unit of speed?
(a) Meter per second (m/s) (b) Kilometer per hour (km/h)
(c) Centimeter per second (cm/s) (d) Millimeter per second (mm/s)
17. What is the time taken by an object to complete one oscillation called?
(a) Period (b) Frequency (c) Amplitude (d) Time period
18. Which of the following is an example of uniform motion?
(a) A car moving on a straight road (b) A ball thrown upwards
(c) A bicycle moving on a circular track (d) A train moving on a zig-zag track
19. What is the graph of a moving object with equal intervals of time called?
(a) Distance-time graph (b) Speed-time graph
(c) Velocity-time graph (d) Acceleration-time graph
20. What is the normal temperature of the human body?
(a) 25°C (b) 30°C (c) 37°C (d) 40°C

SECTION-B (2X6=12)
21. Which acid is injected into our body by an ant sting that causes pain? Write two basic
substances which we use in our daily life. (1+1)
22. Classify the following processes into physical or chemical changes.
(a) Beating of aluminum metal to make aluminum foil
(b) Digestion of food
(c) Cutting of a log of wood into pieces
(d) Burning of crackers

23. Write down the differences between aerobic and anaerobic respiration.
24. What is villi? What is the function of it?
25. A toy train cover 240 m in 2 min. Calculate speed in m/s.
26. Mercury thermometer are used more commonly than alcohol thermometer. What can be the
reason for this?

Page 2 of 4

SECTION-C (3X7=21)
27. Write 3 characteristics of acids by which we can identify acids.
28. A small amount of hydrochloric acid is always produced in the stomach. Is it useful or
harmful for us? If excess of acid is produced in the stomach, what should we do? Give example
of an organic acid. (1+1+1)
OR
Describe two changes that are harmful. Explain why you consider them harmful? How can you
prevent them? (1+1+1)
29. What is symbiotic nutrition? Explain with example? (1+2)
OR
What is photosynthesis? What is the role of plant leaves in photosynthesis?
30. What is digestion? What is the role of stomach in digestion of human? (1+2)
31. What is diaphragm? What is the role of diaphragm in breathing? (1+2)
32. With the help of an example explain how will you calculate the speed from a distance time
graph.
33.Hot water poured in a stainless steel glass cools faster than the hot water in a plastic glass or
ceramic glass. Why does it happen?
OR

Raju walked to school which is 3 km from his house and reached there in half an hour. Calculate
his speed.

SECTION-D (5X3=15)
34.(i)Write down 3 differences between physical and chemical change.
(ii) Write down 2 main properties of bases.(3+2)
OR
(i)Write down 3 differences between acids and bases.
(ii) Explain why burning of a candle considered both physical and chemical change?
35. . Name the types of teeth present in human. Write the number & function of each type. What
is wisdom-teeth? (1+2+2)
OR
What is inhalation? What do we breathe out? Describe the respiration process in human.
(1+1+3)
36. Draw the pattern of uniform motion and non-uniform motion graph in distance time graph .
Manpreet is riding a bicycle home from school. She is approaching a busy area and she sees an
old man crossing the street. The man is walking slowly and she is not sure if she will have time to
stop before she reach him.

What are some things she can do to avoid a collision with the pedestrian? (3+2)
OR
What is breeze? Why does air flow? Explain formation of land breeze with picture. (1+1+3)

Page 3 of 4

SECTION-E (4X3=12)
37. One day Rahul’s mother after taking meal felt pain and irritation in her stomach. His father
was out of station. Rahul was an intelligent boy. He remembered his teacher’s statement and gave
his mother some baking soda solution which gave her a relief from pain and irritation of stomach.
Read the above passage and answer the following questions.
(a) Which information given by Rahul’s teacher that helped him to select the baking soda as
remedy?
(b) Why he selects baking soda as a cure? What is the chemical formula of baking soda?
(c) What is the name of the acid that produced in our stomach? (1+2+1)
38. Our muscle cells can also respire aerobically, but only for a short time, when there is a
temporary deficiency of oxygen. During heavy exercises, fast running, cycling, walking for many
hours or heavy weight lifting the demand for energy is high. But the supply of oxygen to produce
the energy is limited. Then anaerobic respiration takes place in the muscle cell to fulfill the
demand of energy.
Glucose (In muscle, in absence of oxygen)  Lactic acid + Energy
The cramps occur when muscle cell respire an-aerobically. The partial breakdown of glucose
produces lactic acid the accumulation of lactic acid causes muscle cramps. We got relief from
cramps after a hot water bath or a massage. Hot water bath or massage improves circulation of
blood. As a result the supply of oxygen to the muscle cells increase. The increase in the supply of
oxygen results in the complete breakdown of lactic acid into carbon-dioxide and water.(1+1+1+1)
1) Can muscle cells respire an-aerobically?
a. True b. False c. None
2) Which substances causes muscle cramps during strenuous workout or any other
hardcore training-
a. Glucose b. Lactic acid c. None
3) How do we get relief from muscle cramps?
4) How is lactic acid broken down?

39. Rahul noticed that his mother was cooking rice in a vessel made of metal, while his friend's
mother was cooking rice in a vessel made of clay. Both vessels were placed on the same flame,
but Rahul observed that the rice in the metal vessel cooked faster than the rice in the clay vessel.
1. Why did the rice cook faster in the metal vessel? (1 mark)
2. What property of metal allows it to cook food faster? (1 mark)
3. What would happen if the clay vessel was replaced with a vessel made of wood? (1 mark)
4. How does the material of the vessel affect the cooking time? (1 marks)

Page 4 of 4

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