Air | Science Olympiad for Class 1 PDF Download

Air is one of the natural resources from the environment. No one can see or touch air but it is always around us. Humans, Animals and Plants need air to breath. When air moves it is called as Wind. We feel air only when it moves. Air is a mixture of about 78% of nitrogen, 21% of oxygen, 0.9% of argon, 0.04% of carbon dioxide, and very small amounts of other gases. There is an average of about 1% water vapour.

Uses of Air:

• It is filled in balloons and swimming tubes.
• It is filled in the tubes inside the tires.
• It helps to dry clothes.
• It helps to move sailboats and windmills.
• It makes the fire burn.
• It is used for flying kites.

Properties of air:

• Air has weight
• Air occupies space
• Air exerts pressure

Air can be polluted by some gases (such as carbon monoxide, hydrocarbons, and nitrogen oxides), smoke and ash. Air pollution causes various problems including smog, acid rain and global warming. It can damage people’s health and the environment.Air