Page 159 - SST Class 08

Inside Story
Inside Story
g Minerals are formed in different types of geological environments, under varying conditions.
g A mineral may or may not be commercially useful.

g The Stone Age marked the time when humans made weapons and implements from stones.
g Metals can be recycled many times which can help in reducing the demand for fresh
minerals.
g About 65 percent of the total reserve of mineral oil is found around the Persian Gulf.
g Wind is an inexhaustible source of energy.
g Most of the natural resources are limited in stock.

A. Tick (3) the correct option.
1. Which one of the following minerals is not a non-ferrous mineral?

(a) Copper (b) Lead (c) Chromite
2. ______________ is the largest producer of iron ore in the world.
(a) USA (b) Russia (c) Brazil

3. Which one of the following countries is not an important producer of bauxite?
(a) India (b) Brazil (c) Russia

4. Which one of the following is not a variety of coal?
(a) Limonite (b) Anthracite (c) Bituminous
5. Which one of the following power sources is not a non-conventional source of power?
(a) Solar Energy (b) Natural Gas (c) Wind Energy

B. Fill in the blanks.
1. About 3,000 years ago, the ____________ was replaced by the Iron Age.
2. ___________ minerals like iron ore, manganese and chromite contain iron.
3. The non-metallic minerals do not contain ________________ .

4. Coal was the basis for the Industrial Revolution in ___________ .
5. _____________ is used for making automobiles and airplanes.

6. The rise and fall of sea water in the coastal area are called _____________ .
7. When minerals are simply dug out from near the surface, the process is called _________ .
8. _______________ cells convert sunlight directly into electricity.

C. Distinguish between the following.

1. Metallic and Non-metallic Minerals
2. Conventional and Non-conventional Power Resources

Social Science-8 159