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Level 0 Answer Key: Our Environment

Class: 10 Science Type: Basics Key Verified Answers

Section A: Ecosystem Components (Q1-15)

1. Environment

2. Ecosystem

3. Biotic

4. Abiotic

5. Producers

6. Consumers

7. Decomposers

8. Herbivore

9. Carnivore

10. Omnivore

11. Food chain

12. Food web

13. Trophic level

14. 10% law

15. Ecological pyramid

Section B: Waste & Pollution (Q16-30)

16. Biodegradable

17. Non-biodegradable

18. Ozone layer

19. CFCs

20. Ozone hole

21. UV radiation

22. Greenhouse effect

23. Global warming

24. Carbon dioxide

25. Methane

26. Biomagnification

27. DDT

28. Plastic

29. Recycle

30. Reduce, Reuse, Recycle

Section C: Examples (Q31-40)

31. Grass → Grasshopper

32. Frog (secondary consumer)

33. Bacteria, Fungi

34. O₃ (Ozone)

35. Stratosphere

36. Skin cancer

37. Paper, leaves (biodegradable)

38. Plastic (non-biodegradable)

39. First trophic level

40. Autotrophs

Section D: True/False (Q41-50)

41. True

42. False (10%)

43. True

44. False (stratosphere)

45. True

46. True

47. False (increases)

48. True

49. False (non-biodegradable)

50. True