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Hangman: http://www.quia.com/hm/81745.html
Rock Cycle: http://www.classzone.com/books/earth_science/terc/content/investigations/es0602/es0602page02.cfm
Floating Rock: http://www.childrensmuseum.org/geomysteries/floatingrock/a1.html
Igneous Rock: http://www.classzone.com/books/earth_science/terc/content/investigations/es0603/es0603page06.cfm?chapter_no=investigation
How Igneous Rocks Form: http://www.classzone.com/books/earth_science/terc/content/investigations/es0603/es0603page06.cfm?chapter_no=investigation
How Sedimentary Rocks Form: http://www.childrensmuseum.org/geomysteries/floatingrock/b1.html
How Metamorphic Rocks Form: http://www.classzone.com/books/earth_science/terc/content/visualizations/es0607/es0607page01.cfm?chapter_no=visualization
See How Metamorphic Rocks Form: http://www.childrensmuseum.org/geomysteries/floatingrock/b2_alt.html
Rocks Review: http://library.thinkquest.org/J002289/meta.html
Moh’s Hardness Scale: http://www.childrensmuseum.org/geomysteries/cube/b2.html