Air
Air: Overview
This topic covers concepts such as air pollution, causes of air pollution, components of air, oxygen in air, and nitrogen in air.
Important Questions on Air
The earth is surrounded by a layer of gas called ozone that protects us from the harmful rays of the sun. This layer is getting spoilt by harmful gases coming from factories, cars and other sources of smoke.
Can you think of ways in which you could help in reducing these gases?
A gas used in brightly coloured lights is
State the uses of nitrogen and oxygen.
State the names of five rare gases in the air.
Name the following.
The gas in the air that absorbs infrared radiation.
Nitrogen is present in the waste of animals and plants.
Which of these components of air can cause disease if the air is breathed through the mouth?
Which of the following components of air are harmful to the living beings?
What are the tiny shiny particles moving in the beam of sunlight?
Which of the following statement is correct regarding nitrogen?
Which component of the air takes up nearly four-fifth of the space that air fills?
A windmill uses wind energy to generate _____.
Burning can occur only in the presence of _____.
_____ gas is the major component of air.
Plants and animals consume _____ for respiration.
_____ gas is essential for supporting life on the earth.
The burning of fuel leads to the production of
Which of the following components of air occupies approximately four-fifths of the atmosphere?
