Question 2:

_______ are valuable natural resources and they are crucial for our industrial, technological and cultural growth. They are classified into fuel, metallic and non-metallic. 

Question 3:

The combustion of _______ like coal, petroleum etc is a major cause of air pollution.

Question 4:

Industrial waste dumped into water bodies cause chemical imbalance, leading to _____ pollution.

Question 5:

Groundwater gets contaminated due to the use of ________, fertilisers and chemicals and causes serious health hazards to the wildlife in aquatic ecosystems such as diseases, birth defects, and reproductive failure. 

Question 6:

The layer of air above the earth’s surface is called __________. 

Question 7:

_____ plays an important role in the water cycle as water gets evaporated from soil, oceans etc due to Sun’s heat and form clouds. The clouds get cooled by ____ and then these clouds shower as rains. So rainfall depends on the current of the ___.

Question 8:

______ leads to blocking of sunlight from entering water bodies and reduces oxygen values in water, which creates an inhabitable environment.

Question 9:

Burning of ________, wood and rubber also release harmful gases and pollutes the air.

Question 10:

______ minerals include iron, aluminium, copper, tin, nickel, silver, gold and platinum etc.