Hydrosphere
The hydrosphere is all of the water on, under, and around a planet. Water is in the air, on land, between rocks-water is in every living thing! Water in its purest form is H20 (two hydrogen atoms and one oxygen atom). Though water moves and can carry other substances with it, pure liquid waster is what makes all life on Earth possible. Our planet has a perfect temperature range to keep our water on our planet. If our hydrosphere wasn't like it is, we wouldn't have the complex and perfect system for Earth to be our perfect environment.