What is the composition of air?
Which gas in the atmosphere is essential for respiration?
How will you prove that air supports burning?
How will you show that air is dissolved in water?
Why does a lump of cotton wool shrink in water?
The layer of air around the earth is known as _____.
The component of air used by green plants to make their food, is _____.
List five activities those are possible due to the presence of air.
How do plants and animals in help each other in the exchange of gases in the atmosphere?
