2. Water can not only be found on the surface, but also in the ground and in the air.

3. There is the same amount of water on earth as there was when the earth was formed.

4. The overall amount of water on our planet has remained the same for two billion years.

5. There are two kinds of water; salt water and freshwater. Salt water contains great amounts of salt, whereas freshwater has a dissolved salt concentration of less than 1%. Only freshwater can be applied as drinking water.

6. Water consists of three atoms, 2 Hydrogen atoms and an Oxygen atom, that are bond together due to electrical charges.

7. The weight of a water molecule depends on the number of moles present, as it is 18 grams per mole.

8. Water moves around the earth in a water cycle. The water cycle has five parts: evaporation, condensation, precipitation, infiltration and surface run-off.

9. In a 100-year period, a water molecule spends 98 years in the ocean, 20 months as ice, about 2 weeks in lakes and rivers, and less than a week in the atmosphere.

10. Frozen water is 9% lighter than water, which is why ice floats on water.

11. Most of the earth’s surface water is permanently frozen or salty.

12. Water regulates the earth’s temperature.

13. Water freezes at zero degrees Celsius.

14. Water vaporizes at a hundred degrees Celcius.

15. Water is the only substance that is found naturally on earth in three forms: liquid, gas, solid.

16. A litre of water weighs 1.01 kilograms.