5/10/10

Different types of Rocks

In our Inquiry topic about Vanishing Earth we have been learning about different types of Rocks and the rock cycle. here is what one group found out.

There are 3 kinds of rocks .
Igneus Rocks: Igneus rocks are formed by fire and the heat when volcanoes errupt and the liquid rock comes up to the earth's surface then becomes solid.
Sedimentary Rocks: Sedimentary rocks are formed when mountains get old and pieces break off and form lots of layers which are pressed together.
Metamophic rocks: Metamophic rocks are made when igneus or sedimentary rocks are changed by heat and pressure.

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