CBSE Class 8 Science Question Paper Set 23

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Welcome! Check out CBSE Class 8 Science Question Paper Set 23 right here, built according to current 2026-27 exam rules from CBSE, NCERT, and KVS. Get free Class 8 Science previous year question papers with step-by-step solutions to test your preparation level and fix weak points before final tests.

Solved Science Question Papers for Class 8

Check out these Class 8 Science question papers to get familiar with actual test rules and scoring systems. Solving these papers regularly sharpens your time management and problem-solving accuracy. Access the complete CBSE Class 8 Science Question Paper Set 23 to practice at home.

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 SECTION A
1. Name a naturally occurring polymer. What is it made up of? (1)
 
2. Seeds are first grown in nursery and then transplanted to the fields. What is the advantage of this?
 
3. (a) Define force. What is its SI unit?
(b) Why do deep sea animals not survive when brought to the surface of the sea water?
 
4. (a) Write two advantages of using CNG as a fuel.
    (b) Name any two constituents of petroleum obtained after refining.
 
5. State the laws of reflection of light. Draw a diagram to show this phenomenon. (2)
 
6. (a) A ball is thrown up in the air. Name the two forces acting on the ball.
    (b) If the area of head is 15cm x 15cm, how much air (in weight) would you carry on your head?
 
7. (a) Define displacement reaction. Explain a displacement reaction with the help of a word equation.
    (b) Arrange the following metals according to decreasing order of their reactivity: Zinc, Copper, Iron, Potassium
 
8. Give reasons for the following:
(a) We should not let water collect anywhere in the neighbourhood.
(b) Dried neem leaves are used for storing food grains at home.
(c) The role of smaller animals in the ecosystem should not be ignored.
 
9. (a) Shelly can see her face clearly in a new stainless steel plate but not in old one. What could be the reason for this?
    (b) Eyes of the nocturnal birds have large cornea and a large pupil. How does this structure help them?
    (c) You are holding a heavy suitcase in your hands. Explain why the forces acting on it do not change the state of motion of the suitcase.
 
10. (a) Why is petroleum also called as ‘black gold’?
     (b) Give one difference between thermosetting plastics and thermoplastics.
     (c) Why is polyester used to make raincoats and umbrellas?
 
11. Draw a schematic diagram of nitrogen cycle with appropriate labelling and arrows (3)
 
12. (a) Explain the working of a ball bearing with the help of a diagram.
      (b) Give two relevant ways to increase the friction giving suitable examples.
 
13. (a). What is “Project Tiger”? What was the objective of this project?
      (b) Name two endemic flora species of Panchmarhi Biosphere Reserve.
 
14. (a)Name one thermoplastic used in our daily life. State its one use.
      (b) Write two differences between rayon and natural silk.
 
15. Seema is suffering from Tuberculosis. Rita, her friend refrained from visiting Seema.
(a) Why did Rita not visit Seema?
(b) Name the causal organism and mode of transmission of the disease.
(c) Write any two general preventive measures for Tuberculosis.
 
16. (a) What do you understand by persistence of vision of human eye?
      (b) Two plane mirrors are placed perpendicular to each other. An incident ray strikes the first mirror at an angle of 43˚. What is the angle of reflection of the second mirror? ( Show ray diagram)
CBSE Class 8 Science Question Paper Set W
(c) Identify the following parts marked A and B and write one important function of each.
(a)Write two differences between regular and irregular reflection.
(b)Define dispersion. Make a diagram to show the dispersion through a prism showing seven different colours of a spectrum in proper sequence.
 
17. (a) State the property of metals which makes them suitable for making
          i. jewellery
         ii. strings of musical instruments
         iii. electrical wires
         iv. tin cans
   (b) Write word equations for the following:
         i. Zinc granules are added to hydrochloric acid
        ii. Sodium is put in a beaker containing water.
        iii. corrosion of iron
OR
(a) Name the metal/non-metal used
     i. as a protective coat for iron.
    ii. for packaging of food
   iii. as fuel
  iv. in fertilizers.
(b)Write three differences between metals and non-metals on the basis of
    i. Electrical conductivity
   ii. Reaction with acids
   iii. Reaction with water
18. (a) Define deforestation.
     (b) State two beneficial aspects of recycling paper.
     (c) Differentiate between Zoo and Wildlife Sanctuary. (Any two differences)
 
 Please click the link below to download CBSE Class 8 Science Question Paper Set W.

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Practice Exam Question Papers for Class 8 Science CBSE Class 8 Science Question Paper Set 23

Previous Year Question Papers: Class 8 Science

Reviewing the CBSE Class 8 Science Question Paper Set 23 listed above allows Class 8 students to master historical exam patterns. Download these past papers for Class 8 Science instantly in PDF format for the last 10 years. Practicing these authentic questions provides clear insight into marking difficulties and topic distributions, ensuring confidence across all descriptive and MCQ evaluations.

Why Practice Class 8 Science Question Papers?

Frequent problem-solving with the CBSE Class 8 Science Question Paper Set 23 maximizes your academic potential in Class 8 Science. Understand the precise marking scheme and structural expectations set by the CBSE. Practicing these papers in a timed setting sharpens your time management, allowing you to complete your Science test without last-minute panic.

Benefits of downloading CBSE Class 8 Question Papers

Accessing the CBSE Class 8 Science Question Paper Set 23 in PDF format lets you study core topics offline wherever you go. These sets offer dependable practice for numerical questions and model solution approaches. Once finished, cross-check your steps against our educator-verified solutions. For total exam mastery, students should combine these papers with our Class 8 Science sample papers and online MCQ tests.

FAQs

Where can I download the official PDF for CBSE Class 8 Science Question Paper Set 23?

The CBSE Class 8 Science Question Paper Set 23 is available for download on StudiesToday.com. It includes complete set with all sections so that Class 8 students can practice with the exact same paper that came in the CBSE exams.

Are the solutions for CBSE Class 8 Science Question Paper Set 23 based on the official CBSE marking scheme?

Yes, the solutions for CBSE Class 8 Science Question Paper Set 23 are prepared by subject matter experts as per official marking scheme. Class 8 students will understand the structure of answers and 'step-marks' methodology Science.

How does solving CBSE Class 8 Science Question Paper Set 23 help in preparing for the 2026 exams?

Solving previous year papers like CBSE Class 8 Science Question Paper Set 23 is important to understand repeat themes and question difficulty levels of Science. It helps Class 8 students to test their time management skills too.

Can I access CBSE Class 8 Science Question Paper Set 23 in different languages?

Yes, where applicable, CBSE Class 8 Science Question Paper Set 23 is available in both English and Hindi mediums. All students from Class 8 can access Science study material in their preferred language.

Is there a charge to download the CBSE Class 8 Science solved papers?

No, all previous year question papers on StudiesToday, including CBSE Class 8 Science Question Paper Set 23, are provided free of charge in mobile-friendly PDF.