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Changing States of Matter |
| edHelper's suggested reading level: | grades 6 to 8 | |
| Flesch-Kincaid grade level: | 6.98 |
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Changing States of Matter
By Cindy Grigg |
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1 On Earth, almost all matter exists in just three states. Matter is usually a solid, a liquid, or a gas. Plasma, the fourth state of matter, is rare on Earth. It sometimes can be found as lightning. Stars, including our sun, are made of matter in the plasma state. In fact, most matter in the universe exists in the plasma state! States of matter can also be called phases of matter. What causes a solid to be a solid? What causes liquids to be liquid or gases to be gaseous?