Name any three common minerals used by you every day

3

(a)

Give reasons:
Environmental aspects must be carefully looked into before building huge dams

3

(a)

Distinguish between Biogas and natural gas

3

(a)

Give an account of biogas

3

(a)

How do we conserve minerals?

3

(a)

What are the alternative power resources available to humans? Where are they found and how are they used?

3

(a)

State why the use of renewable especially non-conventional sources of energy is becoming necessary in our country

3

(a)

What are the various sources of non-conventional energy?

3

(a)

What is the process of Hydel power generation?

3

(a)

Why are coal, mineral oil and natural gas called fossil fuels ?

3

(a)

On what basis can minerals be identified?

3

(a)

What is mining? Write briefly about two types of mining.

3

(a)

How can you say that the nuclear energy has very bright future in India? Explain briefly.

3

(a)

Name the regions of North America where the minerals deposits are located.

3

(a)

Explain some non-conventional sources of energy.

3

(a)