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Class 8 Olympiad Science Mock Test 4
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Class 8 Olympiad Science Mock Test 4
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25 Questions

1. In which of the following animals fertilisation is external?
2. Which of the following organelles act as the digestive system within the cell?
3. Old news papers and other paper products were collected and treated to make toilet paper. What is this practice known as?
4. By which of these processes is polythene produced?
5. Which of the following is not a precaution to be taken during lightning?
6. What do fuels combine with to produce heat and light?
7. What is the force present between two charged bodies called?
8. Which of the following changes occur in females at puberty?
9. A pin-hole camera works on the principle of
10. On what factors does the frequency of sound depend in wind instruments?
11. What is the source of fly ash?
12. How are earthworms useful to farmers?
13. X is the reproductive cell produced in Y of a female organism while Z is the reproductive cell that is produced in the testes of a male organism. What can X, Y and Z be?X Y Z
14. Which of the following statements is correct?
15. Which of the following is NOT a conductor of electricity?
16. Which of the things will not happen in the world if friction were not present?
17. A deep sea diver's ears get hurt when he is inside the water. What is the cause for it?
18. Which of the following was used by Alexander Flemming to prepare an antibiotic to kill bacteria?
19. Which of the following practices does NOT improve the fertility of soil?
20. Which of these is NOT a major group of activities for improving crop yield?
21. Which of the following optical instruments use plane mirrors for viewing an object?
22. What is the best method to avoid pollution by using plastic bags?
23. Which of the following is the characteristic feature that distinguishes an algae from fungi?
24. When a little aluminium powder is added to dilute sulphuric acid, the product(s) formed in the reaction is/are
25. What is the nature of image formed on the retina of human eye of an object?

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