Water as a liquid, solid and gas.
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L.Gardiner/Windows to the Universe
Changes of State: Solids, Liquids, and Gases
A snowman, glass of water and steam might look very different but they are made of the same stuff! Just like any substance, water has three different forms, called states: solid, liquid and gas. The state will change when the substance is heated.
A snowman is made of snowflakes which are ice, the solid state of water. An ice crystal has a fixed volume and shape and is unable to flow.
When a snowman is heated, it turns into water, a liquid. As a liquid, water has a fixed volume, but its shape changes to fill the shape of its container.
When water is heated, it turns into a gas. As a gas, steam does not have a fixed volume or shape. It expands to fill the shape and volume of its container.
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The Fall 2010 issue of The Earth Scientist
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