H20, otherwise known as water, is made up of 1 oxygen atom and 2 hydrogen atoms. H20 is a clear liquid substance that is essential for life. It can appear as liquid (water), solid (ice), and a gas (water vapor). Water turns into water vapor at 212 degrees Fahrenheit. Water also turns into ice at 32 degrees Fahrenheit.
H20 is essential for life because nothing can survive without it. We drink H20, use it for cleaning, and so much more. This is why H20 is a important molecule that we use everyday.