By Maria Flores Fourth grade Earth Science Standard 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) Types of Rocks Rocks Metamorphic Igneous Sedementary The Igneous rock form when magma of QuickTime™ and a GIF decompressor are needed to see this picture lava cool and hardens Types of Igneous Rocks QuickTime™ and a GIF decompressor are needed to see this picture Sedimentary Rocks are usually made of pieces of rock that have been squeezed and stuck together Types of Sedimentary Rocks QuickTime™ and a GIF decompressor are needed to see this picture • Metamorphic rocks form when heat and pressure change rocks Types Metamorphic Rocks QuickTime™ and a TIFF (LZW) decompressor are needed to see this picture n Ce l tra N er Si y lle Va a ad ev References http://www.tulane.edu/~sanelson/images/snevadabath gif http://www.physical geography.net/fundamentals http://www.childrensmuseum.org/geomysteries