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Weathering, Erosion, and Deposition

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Evelyn McBride

on 26 September 2013

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Transcript of Weathering, Erosion, and Deposition

What is erosion?
weathering -the process by which natural forces break down rocks.
erosion-the process in which different sediments are picked up and moved from one place to another by wind or water.
Chemical weathering
chemical weathering-the break down or decomposition of rock that takes place when minerals change through a chemical processes such as rusting and acid rain that is dissolving the rock.
Mechanical weathering
mechanical weathering-the break down of rock into smaller pieces of the same material without changing the composition.Examples, ice wedging, plant root growth, water abrasion, wind abrasion and exfoliation
The Grand Canyon is an example of weathering
A whole in a mountain is an example of erosion
An island is an example of deposition
Weathering, Erosion, and Deposition

By: Elexia Ochoa and Evelyn McBride
Water effect on Erosion
The most ubiquitous(u-biq-ui-tous- existing or being everywhere, especialy at the same time) form of erosion is by water.Some types of water erosion are rain splash erosion, sheet erosion, and rill erosion.
Sheet Erosion
Rain Splash Erosion
Rain splash erosion is caused by the impact of water striking the ground. Rain splash erosion usally accures in 2 steps. As precicpitation is absorbed by the surface it fills the pore space, loosening the soil particles, and driving them apart.
Rill Erosion
Rill erosion is caused by water concetrating into innumerable, closely spaced, small channels.
Sheet Erosion
Sheet erosion is caused by the unconfined water running across earth's surface. The effects of sheet erosion are often hard to see because such thin layers of soil are being washed away.
Wind Effect On Erosion
Deposition-the process in which transported sediment is laid down
Erosion is the process in which the broken down material caused by weathering is moved.These broken materials can be moved by many things such as wind, ice, and water.
A result of erosion
Problems and solutions for erosion
Erosion can cause problems such as desertifcation and runoff. However there are solutions. Such as terraces you can build them on top of hills to keep your soil from running off. Also contour farming. this is when you plow along curves or contours of a slope to prevent runoff.

Weathering,erosion, and deposition seem boring but they are very important and have been forming are earth for millions of years.
Wind effect on Erosion
Wind is a selective, carrying the finest particles, particulary organic matter, clay, and loam. Sheets of sand travelling close to the ground can effect crops.
Erosion vs. Deposition
The difference between erosion and deposition is that erosion is the process in which sediment is moved by natural forces. However deposition is when sediment is layed down.
Glacier effect on Erosion

Glaciers cause erosion by rubbing up against surfaces.Though mostly water , the glaciers still contian fine sediments which can wear on surfaces.
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