What is an ecosystem?

3

(a)

What do you mean by natural environment?

3

(a)

Which are the major components of the environment?

3

(a)

Give four examples of human-made environment.

3

(a)

What is lithosphere?

3

(a)

Which are the two major components of biotic environment?

3

(a)

What is biosphere?

3

(a)

Give an account of lithosphere

3

(a)

Give an account on atmosphere

3

(a)

How do human beings modify natural environment?

3

(a)

Look at your surroundings. Make a list of uses that the land in your neighbourhood is being put to.

3

(a)

Observe the sky, while coming to school. Make a note whether the day is cloudy, rainy, sunny, foggy, etc.

3

(a)

Why is environment considered as a basic life support system?

3

(a)

What are the reasons for the change in our environments?

3

(a)

In what ways have the human beings modified the environment?

3

(a)