Page 120 - SST Class 07

D. Differentiate between the following.

1. Hydrosphere and Lithosphere
2. Natural Environment and Man-made Environment

E. Answer the following questions.
1. What is called environment?
2. What is the essential feature of lithosphere in respect to our environment in its totality?

3. Name the two chief components of our environment.
4. Describe biological environment and its importance.
5. Describe the inter-relationship and inter-dependence of the realms of the earth.

6. How do changes occur in our physical environment?
7. What is a biosphere? Why is it regarded as the fourth domain of the earth?

8. What is atmosphere? State its chief features in respect to our environment in its totality.
9. What is known as biodiversity? How is man causing harm to biodiversity?
10. How is the earth’s environment in danger today?

H TS Question
H TS Question
Will the life on the earth be possible if any of the sphere is missing from our atmosphere?

Activity & ProjectActivity & ProjectActivity & ProjectActivity && ProjectProject & Project
Activity
Activity
A. Prepare a diagram of the earth showing three realms of the earth and their interdependence.

B. Collect poems, couplets and sayings of great men in English or your mother tongue
about environment.
One in Hindi and one in English are given for you as an example.
Kya hain Jungle ke Upkar
(what are the benefits of forests)
Mittee, Paani or bayar
(soil, water and breeze)
“This earth can satisfy the needs of all, but not the greed of anyone.”

—Mahatma Gandhi

Value Based Question
Value Based Question
Do you know our ancestors were very careful about the protection of their immediate
environment. They deified some valuable trees like peepal, banyan, etc. Nobody was allowed to
harm them in anyway. Collect information on some such traditions which helped in the
conservation of physical and biological environment.

Social Science-7 120