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Water is everywhere, from huge oceans to invisible water molecules making up water vapor in the air. Of course you can see and feel the physical properties of water, but there are also many chemical, electrical, and atomic-scale properties of water that affect all life and substances on Earth.
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Here are some questions and answers about water properties that may interest you:
More water properties resources:
The USGS Water Science School offers many resources to teachers help teach students all about water.