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The Rock Cycle.(Brief Article)

Science Matters: Rain Forest, Moon, Rocks, and Machines, a Weekly Reader publication

| January 01, 1993 | COPYRIGHT 1993 Weekly Reader Corp. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

Any rock can change into another kind of rock if certain things happen to it. These changes may even repeat themselves in a cycle. The rock cycle has no starting point. The changes happen again and again over millions of years. All of Earth's rocks are formed somewhere in those cycles of changes.

Volcano Melted rock shoots out of Earth's crust.

Weathering Ice, rain, wind, arid water wear rocks away.

Transport Streams and rivers carry rock pieces.

Deposition Rivers drop sediments (dirt and sand) into valleys, beaches, and the ocean floor.

Igneous Rock Magma that has cooled into rock on or under Earth's crust

Magma Hot, melted rock inside Earth

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Source: HighBeam Research, The Rock Cycle.(Brief Article)

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