Transcript Weathering, Erosion and Deposition

Weathering, Erosion
and Deposition
Chapter 10.4
Weathering
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The process of breaking down rock into smaller
fragments
Physical Weathering – broken by physical means
Chemical weathering – chemical reactions cause rocks to
breakdown
Biological Weathering – caused by a plant or animal
Physical Weathering
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http://www.uky.edu/AS/Geology/howe
ll/goodies/elearning/module07swf.swf
Chemical Weathering
Erosion
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Once rock has been broken into
fragments, it gets carried away.
Wind, water, glaciers, and gravity are
the main transporters.
Deposition
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After rocks are picked up and moved,
they also get placed down.
http://www.classzone.com/books/earth_science/terc/content/visualizations/es0604/es06
04page01.cfm?chapter_no=visualization
http://faculty.gg.uwyo.edu/heller/SedMovs/loup_river.htm
Chemical Weathering
causes caves
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Carbon dioxide in the air combines
with rainwater to make carbonic acid
This acidic rain falls on the ground
It can react with limestone or marble
underground
The rock disappears and caves form.
http://www.classzone.com/books/earth_science/terc/content/visualizations/es1405/es1405page01.cfm?chapter_no=visualization
Karst Topography
When a large cave is close to the surface a sinkhole can result!
An area with many sinkholes is called karst.
Homework!!
Read Chapter 10.4
Work through section 10.4 in your
workbook
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