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Rocks and Minerals

Metamorphic Rocks

Metamorphic Rocks
Reading Level
     edHelper's suggested reading level:   grades 6 to 7
     Flesch-Kincaid grade level:   4.46

Vocabulary
     challenging words:    igneous, metamorphic, metamorphism, sedimentary, metamorphosis, regional, magma, carving, shale, dynamic, bands, extreme, mineral, cause, during, result

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Metamorphic Rocks
By Patti Hutchison 		  
1     Metamorphosis. Where have you heard that word before? You may remember that insects go through metamorphosis. They change as they go through their life cycle. Metamorphosis means change. Metamorphic rocks are rocks that have changed in some way.
 
2     Metamorphic rocks start out as either sedimentary or igneous rocks. They become buried deep below the earth's surface. Most rocks melt. But some don't. Some rocks stay solid but change form.
 
3     What causes metamorphic rocks to form? The answer is heat and pressure. Heat can come from being buried deep below the surface. Or it can come from a nearby pool of magma. This is called contact metamorphism.

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