
Find out about physical and chemical changes that occur in matter both here on Earth and out in space. Play a game about the physical changes to Mount St. Helen's. Read about Martian gullies that look like those formed by water erosion on Earth. Learn about the element iron, the stuff of stars.
Discover more about the properties of matter and how it relates to the Earth's resources.
 
Discover more about how changes in matter affect the Earth's physical features and climate.
 
Discover more about electricity in the natural world.
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