does a rock remain the same forever? no, rock changes from one rock type to another. weathering...
TRANSCRIPT
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?
Weathering • Weathering – the process of breaking rock
into silt, sand, clay, and other tiny pieces, called sediment.
• Agents of weathering – wind, water, and ice.
Two types of weathering
1. Physical weathering – changes the size
and shape of rocks.
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.
Chemical Weathering2. 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.
ErosionErosion – the process of moving sediments
from one place to another.
Agents for erosion – Water, Wind, and Ice.
The Rock Cycle
The Rock Cycle
Click on the link below and learn more about
the rock cycle.
1. Play the movie.
2. Follow the directions given in the website.
http://www.classzone.com/books/earth_science/terc/content/investigations/es0602/es0602page02.cfm
Visit the Following Websites
http://duedall.fit.edu/wholeearth/geology_animations1.htm
http://walrus.wr.usgs.gov/seds/bedforms/animation.html
Bibliography
• http://www.uh.edu/~jbutler/physical/chapter6.html• http://3dparks.wr.usgs.gov/2005/naturalbridges/html/nb1
64.htm• http://pinker.wjh.harvard.edu/photos/new_zealand_II/ima
ges/Black%20Rocks%2004.jpg• http://www.cartage.org.lb/en/themes/sciences/
earthscience/geology/soils/FormationSoils/WeatheringSoils/ChemicalWeathering/chemicalweathering.htm
• http://earthnet-geonet.ca/glossary/display_term_e.php?term=erosion
• http://www.teachnet-lab.org/ps101/bglasgold/rocks/lesson3rockcycle.htm