Source: D4K: “Water"
Visit the D4K companion Web site to learn more about Water: D4K: “Water"
In this short video segment from IdahoPTV's D4K you discover that water covers 3/4 of the earth and makes up 70% of your body. You will find out why scientists call water H2O. What are the 3 states of water?
[JOAN CARTAN-HANSEN] Water is everywhere. It fills our lakes, rivers and oceans. It's in the food we eat and the air we breathe. Nearly three quarters of our planet is covered by water. It even makes up 70% of our bodies.
The smallest unit of water is a molecule. A water molecule is made up of two hydrogen atoms and one oxygen atom. That's why scientists call water H2O
There are billions of water molecules in a single drop. Water is present in three different states. A state describes a physical condition or a thing.
When water is cold it's solid like this ice sculpture. When water is warm, it's a liquid like this waterfall. And when water is hot it's a gas like the steam rising from this geyser.
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