Answers

2015-11-11T22:42:53+08:00
So we will learn not only about earth but also about outside part of our planet
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Thank you (:
but, you have more ideas?
2015-11-12T00:44:01+08:00
All of that are rocks from outside world and all of them are typically landed on earth.it is important to study both of them so you would have an idea what other elements in the outer space are not present here in our earth....
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