Class 8 Question Paper 2025 Science

ANNUAL EXAMINATION

Question Paper
2025
NCERT BASED SYLLABUS

FOR CBSE AND STATE BOARD
FOLLOWING NCERT

KVS QUESTION PAPERS

SESSION ENDING EXAM (2024-25)
CLASS : VIII SUBJECT:SCIENCE
TIME 2½ HOURS​ MM: 60

GENERAL INSTRUCTIONS:
1.​ Section A contains Question no. 1 to 8 MCQ’s of 1 mark each.
2.​ Section B contains Question no. 9 to 13 are of 2 marks each.
3.​ Section C contains Question no. 14 to 17are of 3 marks each.
4.​ Section D contains Question no. 18 to 20 are of 5 marks each.
5.​ Section E contains CCT Question no. 21to 23 are of 5 marks each.

SECTION A

1. 1. Which of the following travels in a straight line? 1
a) Sound
b) Water waves
c) Light
d) Electricity

2. Ultra sound has a frequency of vibration 1

(a)between 20 and 20,000 Hz. (b)below 20 Hz

(c)above 20,000 Hz. (d)between 500 and 10,000 Hz

3. Adrenal gland releases- 1
(a)Adrenaline​
(b)Thyroxine
(c)Testosterone​
(d)Oestrogen

4. The number of nuclei present in a zygote is 1
(i) none. (ii) one. (iii) two. (iv) four

5. The angle of incidence is equal to the angle of reflection. This is stated by: 1

a) Law of refraction. b) Newton’s first law. c) Law of reflection d) Snell’s law

6. Adolescents should be careful about what they eat, because 1

(i) proper diet develops their brains.

(ii) proper diet is needed for the rapid growth taking place in theirbody

.(iii) adolescents feel hungry all the time.

(iv) taste buds are well developed in teenagers.

7. Which of the following is an application of the chemical effects of electric current? 1

A) Electroplating. B) Electrorefining. C) Production of chlorine gas. D) All of the above

8. Lightning is caused due to: 1

a) Magnetic effect of current. b) Electric discharge in the atmosphere. c) Reflection of light.
d) None of these

SECTION B

9. What is electrolysis? 2

10. The sound from a mosquito is produced when it vibrates its wings at an average rate of 700 2
vibrations per second. What is the time period of the vibration?
11. Give two differences between a Binary fission and budding. 2

12. 1.Loudness is determined by the __________ of vibration 2

2.Unwanted sound is called __________
13.
1.The size of the pupil becomes ____________ when you see in dim light. 2
2.Night birds have ____________ cones than rods in their eyes.

SECTION C

14. 1. Earthquakes can be predicted in advance (T/F) 3

2.A charged glass rod attract a charged plastic straw (T/F)

3.Amoeba reproduces by budding. (T/F)

15. State the laws of reflection.and what do you mean by multiple images formed by plane mirror? 3
16. . Write down secondary sexual character's of male and females. 3
17. What are sex Hormon's? Why are the name so? state their functions? 3
SECTION D
18. 5
What are the causes of a cyclone, and what safety measures should be taken
during a cyclone?

19. a)What are the applications of the chemical effect of electric current in daily life?​ 3+2
b) Does pure water conduct electricity? If not, what can we do to make it conducting?
20. a) Draw a labelled sketch of the human eye.

3+2
b) Explain how you can take care of your eyes

SECTION E(CCT)
21. Case-Based Question: 5

Maya is 13 years old and has recently noticed several changes in her body. Her breasts have started to
develop, and she has also started menstruating. She feels a bit uncomfortable and unsure about
these changes. Maya’s friends at school have also started talking about how they feel different now.
Some of them are experiencing similar changes, while others are at different stages of puberty. Maya
wonders about the reasons behind these changes and how she should deal with them.

1.What are the primary changes that Maya is experiencing, and at what stage of life do they occur?

2.Why do these physical changes occur in Maya’s body?

3.What role do hormones play in these changes?

4.which hormons realese from pancreas?

5.what is puberty?

22. 5
Rahul was excited about his new musical instrument, a guitar. One day, he observed that
when he plucked a string, it started vibrating, producing a sound. He also noticed that
tightening or loosening the string changed the sound. Curious, he experimented further by
placing his hand lightly on a vibrating string and noticed that the sound stopped immediately.
While playing, he also observed that the sound was louder when he plucked the string harder.
His teacher explained that sound is produced by vibrations and can travel through different
mediums like air, water, and solids. She also mentioned that the frequency of vibrations
determines the pitch of the sound.

1.What is the main cause of sound production in Rahul’s guitar?
2.What happens to the pitch of the sound when the strings of the guitar are tightened?
3.Why does the sound stop when Rahul places his hand on the vibrating string?
4.How can Rahul produce a louder sound on his guitar?
5.Through which medium can sound travel?

23. On January 26, 2001, a powerful earthquake struck Gujarat, India. The earthquake had a 5
magnitude of 7.7 on the Richter scale and caused massive destruction in cities like Bhuj,
Ahmedabad, and Rajkot. Thousands of people lost their lives, and many buildings collapsed.
The earthquake was caused by the movement of tectonic plates beneath the Earth's surface.
Relief operations were carried out by the government and various organizations to help the
affected people. Scientists emphasized the importance of earthquake-resistant buildings and
early warning systems to minimize future damage.

1.What was the magnitude of the Gujarat earthquake of 2001?

2.What is the main cause of earthquakes?

3.Which of the following is a safety measure to minimize earthquake damage?

4.Which city was most affected by the 2001 Gujarat earthquake?

5.Why are early warning systems important in earthquakes?

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