Which one of the following technologies converts sunlight directly into electricity?

• Photo-thermic technology

• Photoelectric technology

• Photovoltaic technology

• Photoemitting technology

What is a mineral?

How are minerals formed in igneous and metamorphic rocks?

Why do we need to conserve mineral resources?

Describe the distribution of coal in India.

Why do you think that solar energy has a bright future in India?

Fill the name of the correct mineral in the crossword below:

Across:

1. A ferrous mineral (9)

2. Raw material for cement industry (9)

3. Finest iron-ore with magnetic properties (9)

4. Highest quality hard coal (10)

5. Aluminium is obtained from this ore (7)

6. Khetri mines are famous for this mineral (6)

7. Formed due to evaporation (6)

Down:

1. Found in placer deposit (4)

2. Iron-ore mined in Bailadila (8)

3. Indispensable for electrical industry (4)

4. Geological Age of coal found in north east India (8)

5. Formed in veins and lodes (3)

Why is mica used in toothpaste?

Which one of the following is the hardest mineral?

An accumulation of any mineral mixed with other element is described as

Major metallic minerals like tin, copper, zinc and lead etc. obtained from