Page 180 - Science Class 06

E. Short answer ques ons.
1. Write important solid wastes discarded from homes.

2. What do the liquid wastes contain?
3. Differen ate between biodegradable and non-biodegradable wastes.
4. Why polythene bags are dangerous for environment?

5. Why compos ng is the best way of waste disposal?
6. Write the advantages of reuse and recycling.
F. Long answer ques ons.
1. Describe different types of wastes.

2. Explain the classifica on of wastes.
3. What are the common methods of waste disposal?
4. How can we reduce wastes? Explain. You can also write your own thoughts on the reduc on
of wastes in the environment.

Project ActivityActivityActivity
Project
Project
Project Activity
A. Make a list of waste materials generated in your house and classify them into biodegradable
and non-biodegradable wastes.
Waste Materials Biodegradable Non-biodegradable

1. __________________
2. __________________

3. __________________

4. __________________

5. __________________

6. __________________

7. __________________

8. __________________

B. Make a model of bio-gas plant with the help of cans, pipes, cardboards, gum, etc.

C. Calculate the total amount of wastes generated in every household in your locality by
es ma ng amount of wastes generated in your house everyday.

HO
HO
HOTS TS TS
HOTS
A. Why do we refer to earthworms as ‘farmer’s friends’?
B. Would you prefer to dispose off dry leaves in your garden by burning them or by compos ng
them? Jus fy your answer.

180 Science-6