edHelper.com
Rocks and Minerals
 Igneous Rocks - Don't Just Take Them for Granite

Igneous Rocks - Don't Just Take Them for Granite
Reading Level
     edHelper's suggested reading level:   grades 6 to 7
     Flesch-Kincaid grade level:   4.93

Vocabulary
     challenging words:    Coarse-grained, extrusive, felsic, gabbro, igneous, intrusive, mafic, obsidian, silica, basalt, pumice, colored, dark-colored, magma, fiery, granite

Print Igneous Rocks - Don't Just Take Them for Granite
     Print Igneous Rocks - Don't Just Take Them for Granite  (font options, pick words for additional puzzles, and more)

Quickly Print
     Quickly print reading comprehension

Proofreading Activity
     Print a proofreading activity

Feedback on Igneous Rocks - Don't Just Take Them for Granite
     Leave your feedback on Igneous Rocks - Don't Just Take Them for Granite  (use this link if you found an error in the story)

Igneous Rocks - Don't Just Take Them for Granite
By Patti Hutchison 		  
1     Igneous means "formed from fire." Igneous rocks are formed from fiery magma. This is hot, liquid rock deep inside the earth. When it comes close to the surface, it cools into hard rock.
 
2     How is magma formed? As you go farther below the surface of the earth, temperature and pressure increase. Rocks and minerals melt under these conditions. They combine with gases in a kind of rock soup. As this mixture cools, it forms crystals.
 
3     If the magma breaks through the surface, it becomes lava. It cools very quickly. Extrusive igneous rocks form. The crystals are very small. These rocks have a fine grain quality to them.
 
4     If the magma stays below the surface, it cools slowly. Coarse-grained igneous rocks are formed. The crystals are very large. These are called intrusive igneous rocks.

Paragraphs 5 to 11:
For the complete story with questions: click here for printable
Copyright © 2009 edHelper