Class 8 Science: Sample Paper - 5 | Sample Papers For Class 8 PDF Download

Time: 3 hrs
Total Marks: 80

General Instructions

This question paper consists of 31 questions in total and all questions are compulsory.

• Questions 1–7 are multiple-choice questions and each carries 1 mark. Write the correct answer in your answer sheet.
• Questions 8–16 are very short-answer questions and carry 2 marks each.
• Questions 17–26 are short-answer questions and carry 3 marks each.
• Questions 27–31 are long-answer questions and each carries 5 marks.

Section - A

Q1. Which of the following is a natural fibre?   (1 mark)
(a) Nylon
(b) Polyester
(c) Silk
(d) Acrylic

Q2. Which process is used in water treatment plants to remove insoluble impurities?   (1 mark)
(a) Evaporation
(b) Sedimentation
(c) Distillation
(d) Filtration

Q3. Which of the following is present only in plant cells?   (1 mark)
(a) Nucleus
(b) Mitochondria
(c) Cell wall
(d) Ribosome

Q4. Which property of sound helps us differentiate between a man’s voice and a woman’s voice?   (1 mark)
(a) Loudness
(b) Pitch
(c) Speed
(d) Amplitude

Q5. Which gas is released during respiration?   (1 mark)
(a) Oxygen
(b) Nitrogen
(c) Carbon dioxide
(d) Hydrogen

Q6. Which one of the following is a decomposer?   (1 mark)
(a) Lion
(b) Cow
(c) Mushroom
(d) Goat

Q7. Which device is used to measure temperature?   (1 mark)
(a) Hygrometer
(b) Thermometer
(c) Barometer
(d) Ammeter

Section - B

Q8. Why is petroleum called “black gold”?   (2 mark)

Q9. Name two differences between unicellular and multicellular organisms.   (2 mark)

Q10. What is corrosion? Give one example.   (2 mark)

Q11. What is refraction? Give one example from daily life.   (2 mark)

Q12. Write two precautions to avoid food spoilage.   (2 mark)

Q13. Give two harmful effects of using chemical fertilisers.   (2 mark)

Q14. Why are summers hotter in urban areas compared to rural areas?   (2 mark)

Q15. What is the role of haemoglobin in the blood?   (2 mark)

Q16. State two uses of microorganisms in industry.   (2 mark)

Section - C

Q17. Explain distillation with a diagram.   (3 mark)

Q18. Why are metals used in making electrical wires?   (3 mark)

Q19. What is fermentation? Explain its use in industries.   (3 mark)

Q20. Write three differences between arteries, veins, and capillaries.   (3 mark)

Q21. Explain adaptations in desert plants with examples.   (3 mark)

Q22. How does a rainbow form? Explain with a diagram.   (3 mark)

Q23. What is an electromagnet? How is it made? Mention two uses.   (3 mark)

Q24. Why should we protect wildlife? Write three reasons.   (3 mark)

Q25. What is an electromagnet? How is it made? Mention two uses.   (3 mark)

Q26. What are greenhouses? State two advantages and one disadvantage.   (3 mark)

Section - D

Q27. (a) What is soil erosion?   (5 mark)
(b) Name three causes of soil erosion.
(c) Suggest three preventive measures.

Q28. (a) Define respiration.   (5 mark)
(b) Differentiate between breathing and respiration.
(c) Explain anaerobic respiration with an example.

Q29. (a) What is photosynthesis?   (5 mark)
(b) Explain the role of chlorophyll, water, and sunlight in photosynthesis.
(c) State its importance for life on Earth.

Q30. (a) What are synthetic materials?   (5 mark)
(b) Write three uses of plastics.
(c) Suggest three ways to reduce plastic pollution.

Q31. (a) How do ciliary muscles affect the functioning of eye?   (5 mark)
(b) How can night birds see in the dark?