Question 2:

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 3:

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

Question 4:

 Air consists of 78% _____, 21% ______, and 1% of gases such as carbon dioxide, ammonia, methane, hydrogen, ozone, and other gases such as argon, neon, helium, krypton, xenon, and radon.

Question 5:

Just like bees, ____ also supports pollination, as pollens get blown away by ___ from plants,  cross pollination takes place.

Question 6:

Soil is made up of four components: 1. ____ such as minerals, 2._____ such as humus, 3. air and water, and 4. _____ such as bacteria, and fungi.

Question 7:

_______and ________  permanently harm the surrounding soil. The surface is exposed to erosion, which destroys the quality of the land. The chemicals due to these practices leak into soil, which pollutes it and also, the nearby water bodies.

Question 8:

The zone above troposphere is called the ________. It is rich in ozone gas, which forms the ozone layer. 

Question 9:

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

Question 10:

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