1. Name any three common minerals used by you everyday.
Copper, iron and salt are three common minerals used by everyday.
2. What is an ore? Where are the ores of metallic minerals generally located?
Ore is a rock from which a mineral is mined. Ores of metallic minerals are located in igneous and metamorphic rocks.
3. Name two region rich in natural gas resources.
The two regions rich in natural gas resources are: (i) Jaisalmer (ii) Krishna-Godavari Delta.
4. Which sources of energy would you suggest for i. Rural areas ii. Coastal areas iii. Arid areas?
- Rural areas: Solar energy and wind energy.
- For coastal areas: Wind energy and tidal energy.
- For arid areas: Wind energy and solar energy.
5. Define minerals.
Minerals are naturally occurring substances that have a definite chemical composition.
6. Write the properties of minerals.
The properties of minerals are
- hardness
- solubility
- colour
- density
7. What are power resources?
Power resources are the resources which provide power or energy for industry, agriculture, transport, communication and defence.
8. What do you mean by conventional sources?
Conventional source of energy are those sources which are likely to get exhausted very soon. For example: oil, gas and coal.
9. What is smelting?
Smelting is the process of separating metal from their ores by the use of heat.