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Unveiling Earth's Story: A Journey Through Rocks and Time

Explore the fascinating world of rocks, weathering, erosion, and the rock cycle with this comprehensive guide. Learn about chemical and physical weathering, sediment formation, fossils, and the geologic time scale. Discover the forces that shape our planet and the mysteries hidden within Earth's rocky layers.

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Unveiling Earth's Story: A Journey Through Rocks and Time

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  1. Story in the Rocks By Anna Moorhead, Summer Hatton, and Gavin Jones

  2. Weathering • WEATHERING is a process that decomposes rock, and it occurs in place. • CHEMICAL WEATHERING: involves a chemical change in some of the minerals of a rock • PHYSICAL WEATHERING: involves physically breaking rocks into pieces. • SEDIMENT is material eroded off of rocks that is moved by water, wind, or ice.

  3. Rock weathered by windhttp://images.travelpod.com/users/kitkrozser/1.1243715284.weathered-rock.jpg http://www.incadventures.com/images/grand-canyon-skywalk-rainbow-485.gif

  4. Erosion • EROSION is when a loosened rock piece is moved by water, air, or ice. • Moving water is its main agent. • GRAVITY is the force that pulls things to the center of Earth. It causes eroded material to slide downhill.

  5. The Grand Canyon—scientists think it was eroded away by rock.http://www.incadventures.com/images/grand-canyon-skywalk-rainbow-485.gif

  6. Rock Cycle • The ROCK CYCLE is a model that explains how the different types of rocks are formed. • IGNEOUS ROCKS are rocks formed above and below ground from magma or lava hardening • SEDIMENTARY ROCKS are rocks that form from pieces of rock carried downstream, dropped, and harden into layered rock. • METAMORPHIC ROCKS are rocks that have “morphed” after being under tons of pressure and heat underground.

  7. Diagram of the Rock Cyclehttp://www.rocksandminerals4u.com/images/rock-cycle-diagram-im.jpg

  8. Fossils and the Geologic Time Scale • FOSSILS are impressions/remains of a living creature pressed or buried in rock. • The GEOLOGIC TIME SCALE is the method used to divide Earth’s natural history into parts—it’s determined by rock and fossil finds. • THE LAW OF SUPERPOSITION states that in layers of undisturbed rock, the youngest layer is on top and the oldest is on the bottom.

  9. Fish Fossil and Rock Layers http://www.petrostrategies.org/images/rock09.JPG http://www.mr-damon.com/photo_album/fossils/fish_fossil.jpg

  10. Links • http://imnh.isu.edu/digitalatlas/geo/basics/diagrams.htm • www.fi.edu/fellows/felow1/rocks/create/igneous.htm • http://education.usgs.gov/schoolyard/RockSedimentary.html • www.fi.edu/fellows/fellow1/oct98/create/metamorph.htm • www.dictionary.com • www.nature.nps.gov/geology/usgsnps/misc/gwearo.html • www.watersheds.org/earth/erosion.htm • www.wikipedia.org

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