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IGNEOUS ROCKS
Lesson 1 - Page 2

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Life isnít easy for rocks. They are born from breaking, melting, and extreme pressures. Rocks never die. They are forever forming and changing. We stand on rocks, build with rocks, grow food from rocks, and mine resources from rocks.

Look around and you can see that the products of minerals and rocks are a vital part of our everyday life. Concrete is a building material made of cement (calcite and clay), sand, and gravel. Cinder blocks are reformed cinder deposits from a volcano. Homes use a variety of stones as building and ornamental materials.

The rock cycle is a symbol of an ever-changing Earth. The three types of rocks igneous, metamorphic, and sedimentary, record these changes, and it is up to geologists to decipher the clues and develop a history of the Earth. 

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