Earth's Atomosphere

Earth's atmosphere is mostly made up of nitrogen and oxygen. With these gases, earth's atmosphere makes conditions on earth suitable for living things. That's why living things live on earth and not any other planet because earth provides air. Oxygen and nitrogen is very important to our universe, you can see this from the fact of oxygen and nitrogen being made up of 99% of dry air. Argon and carbon dioxide make up the other 1%. The remaining gases are called trace gases because only small amounts are present. Basically nitrogen, oxygen, carbon dioxide, water vapor, and other gases form molecules from their atoms to produce air that we need to breath!