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Story In the rocks

Story In the rocks. By: Jen Moore , Luke Tacy , Ashleigh Sherman. Weathering.

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Story In the rocks

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  1. Story In the rocks By: Jen Moore , Luke Tacy, Ashleigh Sherman

  2. Weathering • Weathering is a chemical process that causes exposed rock to be decomposed. There are two types of weathering, chemical and physical. Chemical weathering involves a chemical change in some of the minerals in the rock. Physical change involves breaking the rocks into fragments. The Grand canyon was formed by the water weathering the rock.

  3. Erosion • Erosion is a process were the surface of the earth is worn away by water, glaciers winds and waves. The difference between weathering and erosion is weathering has no movement. Sediment is broken down rock and minerals. It’s related to deposition because is moving sediment to different places. The main agent of erosion is moving water. One type of erosion is sheet erosion which is loose soil removed by water in a sheet. Eroded material slides downhill because of water flowing. Also Gravity, a force that keeps things on the ground keeps the erosion and weathering going.

  4. Rock cycle • The rock cycle is a process where rocks are formed, altered, and destroyed by a geological process. There are three types of rock sedimentary, igneous and metamorphic. Igneous rocks are formed when magma is cooled and hardened. Metamorphic rocks are rocks that have morphed under heat and pressure. Sedimentary rocks are sediment packed together into rocks. It normally forms in layers.

  5. Fossils • Fossils are animal and plants in rock. They are most likely found in sedimentary rocks. Fossils are formed over millions of years when dead organisms are trapped in rock. They are a trace of a living thing from a past age.

  6. Superposition • Superpostion is a law that says rock that is younger will be deposited on top of rock that is older. If two layers are laid down the newer one will be on top. If there were fossilized shark teeth on a hill you could probably infer that there was once an ocean there at one point.

  7. Geologic time scale • The Geologic time scale is a system of measurements relating to events that have happened on earth. It divides earths history into periods called eras.

  8. Websites used to find info.Websites 1,2,3,4,5,6 www.nature.nps.gov/geology/usgshp/misc/gweaero.html www.watersheds.org/earth/erosion.htm www.awnsers.com/topic/sheet-erosion http://en.wikipedia.org/wiki/erosion http://scienceguy288.wordpress.com/2008/01/29/north-america-trip-i/the/grand-canyon/ http://dictonary.com

  9. Websites 7,8,9,10,11,12,13 http://imnh.isu.edu/digitalatlasics/geo/basics/diagrams.htm http://www.fi.edu/fellows/fellowl/oct98/create/metamorph.htm www.wikipedia.com http://money.cnn/2007/12/13/smbusiness/fossils.fsb/index.htm http://www.gsa.org.au/resorces/factitesrocks.paf http://www.enchantedlearning.com/subject/geoloictime.html www.dictonary.com

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