What are the seven essential uses of air? Air has many uses. Some of them are as follows:
1. Air contains oxygen, which is
essential for life. All living things respire by breathing in air. The
air we breathe in is inhaled air. The air we breathe out is exhaled air.
2. Air supports burning or combustion.
The oxygen present in air is essential for burning. We burn fuels to
cook food, generate heat and electricity, run industries and drive
vehicles. The presence of nitrogen reduces the activity of oxygen. If
air contained mostly oxygen, even small fires would turn into huge
explosions!
3. The nitrogen present in air is
essential for the growth of plants. Plants take in nitrogen directly
from the air or from the soil.
4. A layer of ozone gas present high up
in the atmosphere protects us from the harmful ultraviolet rays of the
sun. Also during daytime, the atmosphere prevents excessive heat from
the sun from reaching us. At night, the atmosphere traps the surface
heat and prevents it from escaping.
5. Moving air, called wind, has great
force. It enables the movement of sailboats and gliders. It runs
windmills, which are used to generate electricity. Wind also helps in
the dispersal of seeds.
6. Compressed air is used in a number of
ways. It is used to fill tyres. Many machines make use of compressed
air. For example, machines used in mining and digging and the drill used
by dentists work on compressed air.
7. Carbon dioxide is taken from air by plants for photosynthesis, the
process of making their food. The air we breathe out contains carbon
dioxide. Exhaled air can be tested for the presence of carbon dioxide. Use of this web site constitutes acceptance of the
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