- Air is important for all living organisms.
- Without air no life can exist on the Earth.
- We take in oxygen from the air and release carbon dioxide. :
- Plants in turn use carbon dioxide present in the air to produce their food.
- The gases such as oxygen, nitrogen, carbon dioxide, and hydrogen present in the air are important to us for many reasons.
Water Cycle:
Water vapour present in the air is important for the formation of water cycle.
Supplies Energy:
- We breathe oxygen present in the air and it is supplied to the cells in our body.
- Body cells burn the food molecules with the help of oxygen and produce energy.
Sound travels through air:
Sound travels from the point of generation to the listener through air.
Useful for plants:
- Nitrogen present in the air is useful for plants.
- The nitrogen in the atmosphere is converted into easily absorbable nitrates by plants with the help of some microbes.
Transport:
- Movement of air is called wind.
- This is helpful for the ships and boats to sail on the water. Airplanes and helicopters travel through air.
Sports:
- Paragliding and hang gliding are air sports and they are possible with the help of air.
- Other sports like windsurfing, kite surfing, and sailing are also possible with the help of air.
Parachutes and Hot air balloons:
- Parachutes and hot air balloons are used to land from above.
- In case of emergency, people use parachutes and come down slowly and safely with the help of air.
Wind energy:
- Air flows from a region of high pressure to low pressure.
- This flow of air at high speed is called wind.
- This wind is used to generate electric power with the help of windmills.
