Air
Definition
Air is an example of a gas solution made up mostly of nitrogen and oxygen along with small amounts other gases like argon and carbon dioxide.
Analogy
Consider air as the ultimate potluck dinner. Nitrogen brings the most food (since it makes up about 78% of air), oxygen brings less but still quite substantial amount (about 21%), and the other gases bring just a little bit to add some extra flavor.
Related terms
Atmosphere: The layer of gases surrounding Earth, composed primarily of nitrogen and oxygen.
Nitrogen: A colorless, odorless gas that makes up about 78% of Earth's atmosphere.
Oxygen: A gas that makes up about 21% of Earth's atmosphere, necessary for most forms of life.
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