Question

1. What is bad ozone?
2. Differentiate between natural and artificial ecosystem.
3. Why are plastic bags non-biodegradable?
4. Name two decomposers and two producers.
5. Why are pesticides considered as pollutants despite being useful to the farmers
6. Name two artificial eco-system.
7. What is the role of consumers in the food chain?
8. Give one advantage and one disadvantage of ozone.
9. What is an ecosystem? Mention its components.
10. Difference between biodegradable and non-biodegradable substance.
11. Why are green plants called producers?
12. What are the two main components of our environment?
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Answer 1

1. Bad ozone is the ozone present in the troposphere.

2. Natural ecosystem is the one that's already present in nature, for example, deserts, oceans, forests, etc. while an artificial ecosystem is the one made artificially by humans, for example, aquarium, zoo, crop field, etc.

3. Plastic bags are non-biodegradable, that is, they can't be decomposed by the action of decomposers like fungi and bacteria due to their chemical composition and the conditions required to degrade them can only be met in the industries.

4. Two decomposers are fungi and bacteria, and two producers are Chlorophyta and Angiosperms.

5. Pesticides are considered pollutants despite being useful to the farmers because excessive use of pesticides can be carcinogenic to humans and can even cause serious health damage.

6. Two artificial eco-systems are aquarium and crop field.

7. The role of consumers in the food chain is in the transfer of energy from one organism to another in the food chain.

8. One advantage of ozone is that it protects us from the harmful UV rays of the sun and one disadvantage of ozone is that in the troposphere, it acts as a pollutant.

9. Ecosystem is a part of nature where living organisms interact among themselves and also with the non-living components of the environment.

Every living and non-living organism present in it constitute the ecosystem.

10. Biodegradable substances are substances that can be decomposed by the action of decomposers like bacteria or insects or fungi while non-biodegradable substances are those which cannot be decomposed by these decomposers.

11. Green plants are called producers because they produce food for themselves as well as for the consumers.

12. The two main components of our environment are:

• Biotic Components - pathogens, parasites, etc.
• Abiotic Components - water, temperature, light, etc.