Water: a special substance

Ice Water Steam Water is the only substance that occurs on the earth in all 3 states.

H, He and O are the 3 most common elements in the universe.

The earth‘s surface is covered 70-75% with water.

The human body is made up of about 75% water.

In the course of 100 years a single water molecule spends about 98 years in the sea.

18 months as ice

2 weeks in rivers or lakes

Less than a week in the atmosphere