The Rock Cycle

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The Rock Cycle
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Does a rock remain the same forever?

• No, rock changes from one rock type to another.
• Weathering
• Erosion
• Heat
• Pressure

• What are some of the forces that change rocks?

3
Weathering

• Weathering the process of breaking rock into
  silt, sand, clay, and other tiny pieces, called
  sediment.
• Agents of weathering wind, water, and ice.

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Two types of weathering

• Physical weathering changes the size
• and shape of rocks.

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Examples of Physical Weathering

• In cold temperatures, water freezes and expands.
  This creates forces that can crack rock and
  pavement.
• Ground water is precipitation that soaks into the
  ground and soften the mountains.
• Run-off is precipitation that does not soak into
  the ground, but runs across the ground. This
  causes weathering of soil and rocks.

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Chemical Weathering

• 2. Chemical weathering a process that
• changes minerals in rocks.

Crystal Ball Cave, Utah. Features hanging down
from the ceiling are stalactites. Pillar-like
features on the cave floor are stalagmites. Both
stalagmites and stalactites are formed from the
precipitation of limestone within the cave. Image
courtesy of Dr. Ira Sasowsky.
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Erosion

• Erosion the process of moving sediments
• from one place to another.
• Agents for erosion Water, Wind, and Ice.

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The Rock Cycle
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The Rock Cycle

• Click on the link below and learn more about
• the rock cycle.
• Play the movie.
• Follow the directions given in the website.
• http//www.classzone.com/books/earth_science/terc/
  content/investigations/es0602/es0602page02.cfm

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Visit the Following Websites

• http//duedall.fit.edu/wholeearth/geology_animatio
  ns1.htm
• http//walrus.wr.usgs.gov/seds/bedforms/animation.
  html

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Bibliography

• http//www.uh.edu/jbutler/physical/chapter6.html
• http//3dparks.wr.usgs.gov/2005/naturalbridges/htm
  l/nb164.htm
• http//pinker.wjh.harvard.edu/photos/new_zealand_I
  I/images/Black20Rocks2004.jpg
• http//www.cartage.org.lb/en/themes/sciences/earth
  science/geology/soils/FormationSoils/WeatheringSoi
  ls/ChemicalWeathering/chemicalweathering.htm
• http//earthnet-geonet.ca/glossary/display_term_e.
  php?termerosion
• http//www.teachnet-lab.org/ps101/bglasgold/rocks/
  lesson3rockcycle.htm