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Posted by on Thursday, August 19, 2010 at 6:52pm.

The Paleozoic Era is noted for which two changes?

a) rocks were formed
b) the earth heated up
c) people appeared on earth
d) mountains were formed

Just need to know if my answer or right or wrong. Thanks! :)


  • science - , Thursday, August 19, 2010 at 10:41pm

    D is correct. The Appalachians, Urals, and Tasmans are several of the mountain chains that were formed.

  • science - , Friday, August 20, 2010 at 6:43am

    thanks jen :)

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