Question

What is use of air?

25point

Answer 1

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.

Answer 2

Hi friend

Use of Air :-

# Air cuts off the harmful rays of the sun and keeps the temperature of the earth moderate.

# The force of air helps in the movement of sailboats gliders ,parachutes and and aircrafts.

# Birds, bats and insects fly in air

# Air helps in the dispersal of seeds.

# Air plays an important role in the water cycle as it carries water vapour in it.

# Air is vital for combustion purposes.

# Moving air is called wind .Wind energy is used for running windmills. the windmills. The windmills are commonly used for grain griding and generating electricity.