Download - The Process of Change
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The Process of Change
Erosion and Its Effects
http://www.geo-images.com/atlas
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By 6th Grade Student
Ms. Krieter’s ClassRoom M2
August 9, 2002
http://www.geo-images.com/atlas
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Definition of Erosion
• Erosion is the process whereby the soil and the rocky materials of the Earth's crust are loosened, dissolved, or worn away, and then moved from one place to another.
www.cnn.com/2000/NATURE/ 06/27/fema.erosion.02/
http://www.geo-images.com/atlas
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Agents of Erosion
• Running Water • Wind • Glaciers • Gravity
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Running Water
• Running water can carve out dramatic valleys and canyons.
• The picture shows a V-shaped valley carved by a river.
http://www.geo-images.com/atlas
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Running Water
• Running water can carve out dramatic valleys and canyons.
• The picture shows a slot canyon created by extremely fast moving water. This place is very dangerous due to flash floods.
http://www.geo-images.com/atlas
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Running Water
• Sediment is picked up by the water and taken to a lower point.
• This process slowly carves out the land.
http://dgl.microsoft.com/
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Running Water
• Deltas are formed where the sediment is dropped as the water slows down at the sea.
• The picture shows the Nile Delta in Egypt. This is where the Nile flows into the Mediterranean Sea.
http://www.nasm.si.edu/ceps/rpif/ssp/STS076_719_053.gif
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Agents of Erosion
• Running Water • Wind • Glaciers• Gravity
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Wind
• Wind picks up small particles and moves them to another place.
• The picture shows sand dunes created by wind erosion.
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Wind
• Wind picks up small particles and moves them to another place.
• The video shows a dust storm - erosion in progress.
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Agents of Erosion
• Running Water • Wind • Glaciers • Gravity
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Glaciers
• Glaciers pick up large sediment and very slowly carve out large U-shaped valleys.
• Yosemite Valley in California was created by a glacier.
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Glaciers
• Glaciers pick up large sediment and very slowly carve out large U-shaped valleys.
• Half Dome in Yosemite Valley was sliced in half by a glacier.
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Agents of Erosion
• Running Water • Wind • Glaciers • Gravity
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Gravity
• Gravity causes materials to go downhill. This movement can be slow or quick.
• The picture shows cleaving; a piece of rock broke off and fell to the ground.
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Gravity
Four types of erosion caused by gravity.
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Gravity
http://www.uwsp.edu/geo/faculty/ritter/images/lithosphere/mass_wasting_erosion/landslide_La_Conchita_CA_USGS_slide21_small.jpg
Slump
http://www.aqd.nps.gov/grd/parks/tica/tica_virtual_fieldtrip/Stop3.htm
Rockslide
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Comprehension Questions1. What is erosion?
2. Give an example of erosion and what caused it.
3. What agent of erosion caused what you see in the picture?
http://www.geo-images.com/atlas
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Sourceshttp://www.geo-images.com/erosion.jpg
http://www.geo-images.com/atlas
http://www.school.discovery.com/clipart/
http://www.nasm.si.edu/ceps/rpif/ssp/STS076_719_053.gif
http://dgl.microsoft.com/
http://www.uwsp.edu/geo/faculty/ritter/images/lithosphere/mass_wasting_erosion/landslide_La_Conchita_CA_USGS_slide21_small.jpg
http://www.aqd.nps.gov/grd/parks/tica/tica_virtual_fieldtrip/Stop3.htm
www.cnn.com/2000/NATURE/ 06/27/fema.erosion.02/