Matching Pairs The weatherOnline version Let's learn about the atmosphere by Daniel Educaplay 1 Oxygen 2 Carbon dioxide 3 Nitrogen 4 Water vapour 78% of the air. Living things need it to live and grow. Makes up only 0.04% of the air, but it's very important. Plants need carbon dioxide to make their own food. Makes up a very small part of the air we breathe. 21% of the air. Living things need it to live and breathe.
