NCERT Class 10 Science Our Environment Answers

Multiple Choice Questions
1. (b) 2. (a) 3. (c) 4. (d)
5. (c) 6. (a) 7. (b) 8. (c)
9. (a) 10. (a) 11. (c) 12. (d)
13. (a) 14. (b) 15. (c) 16. (a)
17. (c) 18. (d) 19. (b) 20. (c)
21. (d)

Short Answer Questions

22. Wastes pollute our environment, air, soil and water, and cause harmful effects on all living organisms.

23. Phytoplanktons and aquatic plants → small aquatic animals larvae, insects etc) → fish → bird

24. Cloth bags are

(a) capable of carrying more things

(b) made of biodegradable material

(c) do not pollute our environment

(d) can be reused

25. Crop fields are man made and some biotic and abiotic components are manipulated by humans

26. Substances that are broken down into simpler substances by biological processes are said to be biodegradable. Examples, wood, paper. Substances that cannot be broken down into simpler ones by biological processes are said to be non-biodegradable. Examples, plastic, DDT.

27. (a) Environment/biosphere

(b) Trophic level

(c) Abiotic factors

(d) Consumers/heterotrophs

Please refer to attached file for NCERT Class 10 Science Our Environment Answers