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Rocks and Minerals
 Bowen's Reaction Series

Bowen's Reaction Series
Reading Level
     edHelper's suggested reading level:   high interest, readability grades 6 to 8
     Flesch-Kincaid grade level:   6.94

Vocabulary
     challenging words:    felsic, gabbro, igneous, mafic, muscovite, further, basalt, geologist, magma, solution, granite, theory, mineral, lower, composition, light-colored
     content words:    Geologist Norman Bowen, Norman Bowen

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Bowen's Reaction Series
By Patti Hutchison 		  
1     Igneous means made from fire. Igneous rocks form when magma cools. As it cools, minerals "drop out" and form crystals. These minerals can be either mafic or felsic.
 
2     Mafic minerals are dark in color. They are produced at high temperatures. Mafic minerals include olivine and pyroxene. Basalt and gabbro are common mafic rocks.
 
3     Felsic minerals are light-colored. They include quartz and mica. The most common felsic rock is granite.
 
4     How do all these different minerals and rocks form from the same magma? Geologist Norman Bowen came up with a solution to this puzzle. It is called Bowen's reaction series.

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