What FACTS ABOUT ROCKS do you know? They are abundant on earth, and yet little is known about them. These facts will increase your knowledge of the rocks.
8monon MSN
You can use apps like "Rock Identifier: Stone ID" to quickly determine the value of rocks. These apps have a database for you ...
The rocks on Earth are constantly changing due to many different processes. There are three main types of rock, with rocks changing between each type over millions of years. This rock recycling is ...
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