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Because of the high heat, igneous rocks ______ contain _______. never fossils

This mixture is called ______________. Sedimentary rocks form when eroded bits of existing rocks combine with decomposing organic matter. This mixture is called ______________. sediment

Sediments are carried into bodies of water and pile up on top of each other over millions of years. www.pacificislandtravel.com

When sediments are dropped off into bodies of water, this process is called __________. deposition

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This process is called _________________. Their own weight plus the weight of the water above them causes __________ to build up. pressure pressure The _________ squeezes out the water and compresses the sediments together. This process is called _________________. compaction

Sometimes, organic matter forms ________. fossils Jellyfish Fossils http://ls.berkeley.edu/files/images/jellyfish_fossils-lg.jpg

cementation layers The sediments bond together into sedimentary rock. This process is called _______________ cementation Sedimentary rock is usually built up in _________ which are visible when you examine a rock sample. layers

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Sedimentary Rocks library.thinkquest.org

igneous sedimentary changed pressure heat without melting Metamorphic rocks form when ________ or ____________ rocks are _________ by _________ and _____ but ________ ________. igneous sedimentary changed pressure heat without melting

An existing rock may heat up if it comes near _________. magma

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These sections of crust are called __________________. A rock may also get heat and pressure if a section of Earth’s crust moves over it. These sections of crust are called __________________. tectonic plates

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They sometimes ______ into ______. Metamorphic rocks usually contain _________ and may be _____ and _____. crystals hard shiny flake They sometimes ______ into ______. layers

library.thinkquest.org Layers of slate

Slate Roof www.global-b2b-network.com

Slate Floor Tiles www.outdoorfloors.net

Metamorphic rocks have the same ____________________ as the rocks they were made from. chemical make-up

Metamorphic Rock www.littlenaturemuseum.org/new.html

topex.ucsd.edu/.../lecture10/lecture10.html http://www.classzone.com/books/earth_science/terc/content/investigations/es0602/es0602page02.cfm

DRAW THIS CHART ON THE BACK OF YOUR NOTES COMMON USES OF ROCKS Rock Type Example Use Igneous 1. 2. 3. Sedimentary Metamorphic Granite Countertops Pumice Soap Sculpture Toothpaste Tombstones Erasers Coal Limestone Improve soils Energy Fingernail Polish Gravel Buildings Steel Marble Countertops Slate Roofing Sculpture Blackboards Knife Sharpening Paper