Erosion & Deposition Mr. Skirbst Life Science Topic 21.
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Transcript of Erosion & Deposition Mr. Skirbst Life Science Topic 21.
![Page 1: Erosion & Deposition Mr. Skirbst Life Science Topic 21.](https://reader038.fdocuments.in/reader038/viewer/2022110320/56649ccc5503460f94996312/html5/thumbnails/1.jpg)
Erosion & Deposition
Mr. SkirbstLife Science
Topic 21
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Erosion
Movement of particlesfrom place to place
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Deposition
Settling of particlesin a new place
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5 Agents of Erosion
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5 Agents of Erosion1. Gravity
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5 Agents of Erosion1. Gravity2. Wind
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5 Agents of Erosion1. Gravity2. Wind3. Water (running on surface)
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5 Agents of Erosion1. Gravity2. Wind3. Water4. Ice
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5 Agents of Erosion1. Gravity2. Wind3. Water4. Ice5. Waves
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Other Agents of Erosion
Biological activityExtraterrestrial Material
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1 - Gravity
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1 - GravityMass wasting – downhill
movement of sediments
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1 - GravityMass wasting – downhill
movement of sedimentsExamples:1- landslides2- mudslides3- avalanche
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2 - Wind Erosion (Aeolian)Deflation – movement of loose
material (clay, silt, sand)- small particles carried farther that larger
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2 - Wind Erosion (Aeolian)Abrasion – wearing away and
“blasting” of exposed rock
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2 - Wind DepositionDunes – mound of sand
deposited by wind
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2 - Wind DepositionLoess – fine sand and silt
deposited in layers far from place of origin
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3 - Running Water3 Forms of erosion1. Runoff – flow of water over
the land surface
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3 - Running Water1. RunoffFactors affecting runoff:
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3 - Running Water1. RunoffFactors affecting runoff:a. – rainfall amount
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3 - Running Water1. RunoffFactors affecting runoff:a. – rainfall amountb. – shape / slope of land
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3 - Running Water1. RunoffFactors affecting runoff:a. – rainfall amountb. – shape / slope of landc. – plant growth & density
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3 - Running Water1. RunoffFormations from runoff:
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3 - Running Water1. RunoffFormations from runoff:a. – rills: tiny grooves in ground
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3 - Running Water1. RunoffFormations from runoff:a. – rills: tiny grooves in groundb. – gullies: wide, deep rills
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3 - Running Water2. Streams – flow of water
through a small valley (deep gully)
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3 - Running Water2. Streams – flow of water
through a small valley (deep gully)- formed from gullies joining
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3 - Running Water2. Streams – flow of water
through a small valley (deep gully)- formed from gullies joining
Streamload – particles carried by stream water
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3 - Running Water3. Rivers– flow of water
through a valley formed by streams joining together
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3 - Running Water3. Rivers– flow of water
through a valley formed by streams joining togetherTributaries – rivers that flow into a major river
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3 - Running Water3. Rivers– flow of water
through a valley formed by streams joining togetherTributaries – rivers that flow into a major riverWatershed – entire area drained by a single river
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4 – Ice Glaciers –
Valley glaciers in mountain regions carve out mountains
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4 – Ice Glaciers –
Valley glaciers in mountain regions carve out mountainsContinental glaciers during ice ages created a erosional and depositional features
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5 – WavesOceans – result in coastal
erosion due to long-shore drift, waves, and storms