Uses of Air


 
 
Concept Explanation
 

Uses of Air

Air :

Air is the mixture of gases, mainly containing nitrogen and oxygen. Without air life is not possible on Earth.

Uses of Air:

Besides breathing, air is useful to us in many other ways:

  • 1. The wind makes wind mills rotate. The windmills are used to draw water from the tube wells and run flour mills.It is now being used to generate electricity.
  • 2. Aeroplane, helicopters, balloons, parachutes and yachts work because of air.
  • .... (More Text Available, Login?)
    Sample Questions
    (More Questions for each concept available in Login)
    Question : 1

    Which of the following is correct :

    (a) Air is required for respiration.

    (b) Air helps in the dispersal of seeds.

    Right Option : C
    View Explanation
    Explanation
    Question : 2

    Air moves from a region of ____________ pressure to one of _____________ pressure.

    Right Option : D
    View Explanation
    Explanation
    Question : 3

    Which of the following are correct :

    (a) Plants require carbon dioxide of the air to make their food by a process called respiration.

    (b) A green house is a glass building used for growing plants that need protection from cold.

    (c) Plants require carbon dioxide of the air to make their food by a process called photosynthesis.

    Right Option : B
    View Explanation
    Explanation
     
     


    Students / Parents Reviews [20]