Homework Help: earth science

Posted by ? on Sunday, January 13, 2013 at 3:02pm.

which of the following element are found in the Earths crust?
iron
oxygen
calcium
all of the above

earth science - ?, Sunday, January 13, 2013 at 3:03pm
#26
earth science - DrBob222, Sunday, January 13, 2013 at 3:03pm
All of them.
earth science - ?, Sunday, January 13, 2013 at 3:06pm
thanks
earth science - DrBob222, Sunday, January 13, 2013 at 6:21pm
I should point out that none of them are in their free state. For example, you won't find oxygen gas but you will find it as oxides (iron oxide, calcium oxide, etc).

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