By Maria Flores

4. The properties of rocks and minerals reflect the processes that formed them. As a basis for understanding this concept:

a. Students know how to differentiate among igneous, sedimentary, and metamorphic rocks by referring to their properties and methods of formation (the rock cycle).

Fourth grade Earth Science Standard

Types of Rocks

Metamorphic Igneous Sedementary

Rocks

The Igneous rockform when magma of

lava cool and hardens. QuickTime™ and aGIF decompressor

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Types of Igneous Rocks

Sedimentary Rocks are usually made of pieces of rock that have been squeezed and stuck together.

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Types of Sedimentary Rocks

• Metamorphic rocks form when heat and pressure change rocks.

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Types Metamorphic Rocks

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Central Valley

Sierra Nevada

References

http://www.tulane.edu/~sanelson/images/snevadabath.gif

http://www.physical geography.net/fundamentals

http://www.childrensmuseum.org/geomysteries