Page 160 - SST Class 08

D. Write True or False.

1. Even the Iron Age has been replaced by the Copper Age in modern times.
2. A non-ferrous mineral does not contain iron.
3. India is the largest producer of silver in the world.

4. Coal is widely used to generate thermal electricity.
5. The total coal reserves of India are about 18,000 crore metric tonnes.

6. USA and Africa are the leaders in generating electricity from geothermal energy.
E. Answer the following questions.

1. What are the main characteristics of minerals?
2. How did minerals influence the history of human civilization?
3. Why is petroleum called ‘black gold’?

4. How can we conserve minerals and power resources?
5. Explain the methods of minerals extraction.
6. Discuss different types of minerals in detail on the basis of their composition.

7. Discuss non-conventional power sources.
8. Write a short note on ‘Energy— needs of the future.’
9. Why are minerals mined only in those regions where they occur in the form of ores?

10. Why do you think the conventional power sources are more popular than non-
conventional power sources?
H TS Question
H TS Question

Use of non-conventional energy resources should be encouraged. Explain this statement.

Activity
Activity & ProjectActivity & ProjectActivity & ProjectActivity && ProjectProjectActivity & Project

A. Have a brainstorming session on ‘the problems and future of conventional sources of energy
in India’.

B. On an outline map of the world, mark and label the following.
1. Iron ore producing areas in USA and Russia

2. Mineral oil producing areas in the Persian Gulf region
3. Copper producing areas in Africa and South America
4. Coal producing areas in Australia, China and Europe

C. On an outline map of India, mark and label the following.
1. Narora, Tarapur, Kalpakkam
2. Ankleshwar, Digboi, Bombay High
3. Dams—Bhakra, Hirakund, Koyna
4. Talcher, Bailadila, Kolar, Jharia, Khetri

Social Science-8 160