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Last Updated: Wednesday March 15 2006 11:04 GMT

Where does water come from?


Water covers about 70% of the Earth's surface, it's the liquid form of the chemical H2O.

The H stands for Hydrogen and the O is for oxygen. Each molecule of water contains two bits of hydrogen and one bit of Oxygen, that's why the number 2 appears after the H.

If you freeze water it turns into a solid called ice, boiling changes it into a gas called water vapour.

Where can I get some?

About 97% of the water on the Earth's surface is in the world's oceans.

This is where you can find most of the other 3%:

    Lakes Rivers Polar ice caps Clouds Rain Stored in rocks (aquifers) Sea ice