Question 2:

Use of pesticides, fertilisers pollute the air by releasing harmful _______ into it.

Question 3:

____ is a good conductor of sound, we can hear speech or music or noise in the presence of _____.

Question 4:

Air pollution causes a variety of environmental effects such as _______, ______, ________, damage to crops and forests, and climate change.

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:

Oxygen and _________ of stratosphere protect us from the ill-effects of ultraviolet light rays of sunlight.

Question 7:

The air that we breathe is present in the first zone of earth known as _______. It is 10 to 12 km from the surface of the earth.

Question 8:

________  are also crucial for economic development of a country as they contribute to urbanisation, industrialisation, transportation and communication systems, and it becomes important that ______ are sustainably used.

Question 9:

Minerals such as _______ and ______ are important sources of energy. They are widely used in different sectors such as transport, agriculture and industry. 

Question 10:

_______ can change the soil chemistry of an area, and it can also leach out the nutrients inside it.