class10 important questions our environment

IMPORTANT QUESTIONS:

   

1. Why is improper disposal of waste a curse to environment?
2. Write the common food chain of a pond ecosystem.
3. What are the advantages of cloth bags over plastic bags during shopping?
4. Why are crop fields known as artificial ecosystems?
5. Differentiate between biodegradable and non-biodegradable substances. Cite examples.
6. Suggest one word for each of the following statements/ definitions
   • (a) The physical and biological world where we live in
   • (b) Each level of food chain where transfer of energy takes place
   • (c) The physical factors like temperature, rainfall, wind and soil of an ecosystem
   • (d) Organisms which depend on the producers either directly or indirectly for food
7. Explain the role of decomposers in the environment?
8. Select the mis-matched pair in the following and correct it.
   • (a) Biomagnification — Accumulation of chemicals at the successive trophic levels of a food chain
   • (b) Ecosystem — Biotic components of environment
   • (c) Aquarium — A man-made ecosystem
   • (d) Parasites — Organisms which obtain food from other living organisms
9. We do not clean ponds or lakes, but an aquarium needs to be cleaned. Why?
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11. Indicate the flow of energy in an ecosystem. Why is it unidirectional? Justify.
12. What are decomposers? What will be the consequence of their absence in an ecosystem?
13. Suggest any four activities in daily life which are eco-friendly.
14. Give two differences between food chain and food web.
15. Name the wastes which are generated in your house daily. What measures would you take for their disposal?
16. Suggest suitable mechanism (s) for waste management in fertiliser industries.
17. What are the by-products of fertiliser industries? How do they affect the environment?
18. Explain some harmful effects of agricultural practices on the environment.