What Is Air Made of?
Air is the mixture of gases in our atmosphere. It is mainly nitrogen (seventy eight percent) and oxygen (twenty one percent).
However, the amount of oxygen in the air isn’t the same everywhere you go. The farther you move away from sea level, the less oxygen you’ll find in the air.
For example, there’s less oxygen in the air at the peaks of tall mountains. That’s why mountain climbers often have to use oxygen tanks to ascend to the world’s highest peaks, such as Mount Everest.
The rest is chiefly argon. There are also tiny amounts of carbon dioxide, neon, helium, hydrogen, ozone, krypton, methane and xenon. The air also contains water. It is this which forms rain clouds.
Factories and house produce smoke and dust which goes into the air. These can be harmful and are known as air pollution.
Almost all the living things on Earth need air. Animals breathe in air to obtain the oxygen they need to stay alive. Plants take carbon dioxide out of the air for photosynthesis.
So even though you can’t see all these gases and microscopic particles in the air around you, they’re there and they make up a substance that your body needs.