Last updated on August 31, 2019
The atmosphere of the earth is made up of several different gases.
NITROGEN – 78%
A gas that can be ” fixed” in the soil, as well as loose in the atmosphere. plants need nitrogen from the soil to survive.
OXYGEN – 21%
Essential for animals to breathe, oxygen was absent until microbes evolved that could use sunlight to turn carbon dioxide and water into carbohydrates, releasing oxygen.
ARGON – 0.9%
An inert gas.
OTHER – 0.1%
Thes include carbon dioxide, which was once abundant, but now is mostly incorporated into materials such as limestone rock.