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More from Crystal Cave of Giants http://www.canyonsworldwide.com http://www.canyonsworldwide.com http://www.canyonsworldwide.com Because of the high heat, igneous rocks ______ never contain _______. fossils 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 __________. higheredbcs.wiley.com picasaweb.google.com Their own weight plus the weight of the water above them causes pressure to build up. __________ pressure squeezes out the The _________ water and compresses the sediments together. This process is called compaction _________________. Sometimes, organic matter fossils forms ________. http://ls.berkeley.edu/files/images/jellyfish_fossils-lg.jpg The sediments bond together into sedimentary rock. This process is called cementation _______________ Sedimentary rock is usually layers which built up in _________ are visible when you examine a rock sample. www.wellcollc.com library.thinkquest.org Metamorphic rocks form when igneous or ____________ sedimentary ________ rocks are _________ changed by _________ pressure and _____ heat but without ________. ________ melting An existing rock may heat up if it comes near _________. magma stloe.most.go.th 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 __________________. www.scienceclarified.com www.waterencyclopedia.com Metamorphic rocks usually contain _________ crystals and may be _____ hard and shiny _____. flake They sometimes ______ into ______. layers library.thinkquest.org www.global-b2b-network.com www.outdoorfloors.net Metamorphic rocks have the same chemical make-up ____________________ as the rocks they were made from. 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 Igneous Sedimentary Metamorphic Example Granite Coal Marble Use 1. Countertops Example Pumice Use 1. Soap 2. Sculpture 2. Toothpaste 3. Tombstones 3. Erasers 1. Energy Limestone 1. Improve soils 2. Fingernail Polish 2. Gravel 3. Steel 3. Buildings 1. Countertops 2. Sculpture 3. Paper Slate 1. Roofing 2. Blackboards Knife 3. Sharpening
