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:

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 4:

Emissions from _______, ________ and manufacturing activities release high levels of carbon monoxide, organic compounds, and chemicals into the air.

Question 5:

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

Question 6:

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

Question 7:

Soil contains _____, ____, which provide a source for medicines, cosmetics, talcum powders etc.

Question 8:

_____ occur when air gets polluted with sulphur dioxide and nitrogen oxide. Then they mix with water particles in the air to form a toxic substance. ________ lead to increased growth of algae, which leads to eutrophication.

Question 9:

_____ 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 10:

The seas, ocean, rivers, lakes etc form the ________.