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by Countess Crapula on February 17th, 2009
Depends on the rock. Hundreds of minerals (iron, cobalt, copper), silica, mud, bones, salt, sand make up rocks. Three types of rocks: igneous, sedimentary, and metamorphic. Look them up.
GEOLOGY RULES!
I need some good study tips, can any one help?
by anonymous on April 27th, 2011
| 1 person likes this
How can I make myself study more, if I find the material very difficult to learn ?
by sem1986 on July 17th, 2011
| 1 person likes this
What will help u sustain a 3rd World war?
by Wises on March 8th, 2011
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"A national challenge to stop cutting up animals in biology classes has support from many directions". Do you support that?
by RosieGHM Jetpacker on May 31st, 2011
| 1 person likes this
can you give me some GOOD STUDY HABITS!!?
by sillygirl08 on May 13th, 2011
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