Page 139 - SST Class 08

5. What are the different non-conventional sources of energy? Which of them can be used in India
effectively?
6. How is copper useful? Mention where it is found in India.

F. Answer the questions in detail :
1. How are metallic minerals different from non-metallic minerals?
2. What are the five main sources of energy?

3. What measures can be adopted to conserve minerals?
4. Give the importance of iron ore. Also name the important iron ore producing countries in the world.
5. What do you mean by solar energy? Describe briefly.

6. Write a short note on natural gas.

1. What are the negative impacts of extraction and disposal of minerals on the environment?

2. Why there is a need for development of non-conventional sources of energy?

Fossil Fuels
Coal, mineral oil and natural gas are the main sources of energy consumed in the world today. They are
called fossil fuels because of their organic origin. The reserves of these minerals are limited but they are
used abundantly both for commercial and non-commercial purposes like cooking , heating etc. They are
a major requisite in iron and steel industries, chemical industries and generation of thermal electricity.
Their consumption is greater than the rate of their formation, so they are likely to get exhausted soon.

Minerals and Energy Resources
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