Our Environment-HOTS Questions

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?

1.  Why are bacteria and fungi called decomposers? List any two advantages of decomposers to the environment.     (CBSE 2008)

2.  Distinguish between producers and decomposers. Classify the following as producers and decomposers: green plants, bacteria, fungi, blue-green algae.     (CBSE 2008 F)

3.  Why is the ozone layer getting depleted at the higher levels of the atmosphere?     (CBSE 2008)

4.  Name any two abiotic components of environment.     (CBSE 2009)

5.  What are the two main components of our environment?     (CBSE 2009)

6.  Which compounds are responsible for the depletion of ozone layer?     (AI CBSE 2009)

7.  Why are green plants called producers?     (AI CBSE 2009)

8.  Which disease is caused in human beings due to depletion of ozone layer?     (CBSE 2009 F)

9.  Distinguish between biodegradable and non-biodegradable substances.     (CBSE 2008)

10.  �Damage to ozone layer is a cause of concern�. Justify this statement and suggest two steps to limit this damage.     (CBSE 2008)