leq: how do erosion and deposition affect earth’s surface? types of landforms caused by erosion...
TRANSCRIPT
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LEQ: How do erosion and deposition affect Earth’s surface?
TYPES OF LANDFORMS CAUSED BY EROSION
& DEPOSITION
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Landforms created when sediment is removed from an area are caused by __________.
Landforms created when sediment is placed or dropped in a new area are caused by __________________.
REMEMBER….
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What erosional force causes Mass Movements?_______________
Name the four types of mass movement.1._____________/__________2._______________3._______________4._______________
EROSION BY GRAVITY
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EROSION BY GRAVITY
_________
_____________
_________lide
___________
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Any water that runs over the Earth’s surface is considered __________.
Moving water is a MAJOR agent of __________!
Some areas have more runoff than others. HILLY areas have more runoff than flat areas.Areas with a LOT of rain have more runoff than areas with little rain.
Areas with FEW plants have more runoff than areas with many plants.
RUNNING WATER
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Like the other agents of erosion, running water creates MANY different Landforms._______________ ____________________________ Fan (p. 215)Meander______________Flood PlainsDeltas
Let’s look at the picture & decide if they were created by erosion or deposition (p. 216-217)
RUNNING WATER
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V-Shaped ValleyRunning Water _________River flows through a deep ____- _________ valley near its source. As the river flows, it cuts the valley ________.
RUNNING WATER
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RUNNING WATER
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WaterfallsRunning water___________When the river flows over hard rock that is difficult to erode it creats steep drops or waterfalls.
RUNNING WATER CONT.
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RUNNING WATER - WATERFALL
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Alluvial FansRunning Water __________A wide, sloping deposit of sediment formed where a stream leaves a mountain range.
RUNNING WATER CONT.
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RUNNING WATER – _________ _______
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MeandersRunning Water _________A loop-like bend in the course of a river (p. 214)
RUNNING WATER CONT.
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RUNNING WATER - _________
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Oxbow LakeRunning Water _________A meander that has been cut off from the river. (p.214)
RUNNING WATER CONT.
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RUNNING WATER – ________ _______ LAKE
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Flood PlainsRunning water ___________The FLAT area on the banks of the river where rich soil develops when the river drops sediments when it floods.
RUNNING WATER CONT.
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RUNNING WATER – _________ ________
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DeltasRunning Water ___________Where the river flows into the ocean, it deposits sediments, forming a delta.
RUNNING WATER CONT.
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RUNNING WATER - _________
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•Wave Cut Cliff•Wave __________•A cliff cut away by waves
•Spit•Wave ____________•Formed as sand deposits along the shore (looks like a finger)
FIND WAVES…
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Sand BarWave _____________Formed by wave action; deposit of sand.
WAVES CONT.
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PICTURES
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• Caves•Groundwater _______________•Water reacts with limestone in rocks & dissolves it, leaving a cave behind.
• Stalagmite•Groundwater DEPOSITION• Slow dripping builds up cones from the cave floor.
FIND GROUNDWATER…
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StalactiteGroundwater _______________Hangs like an icicle from the roof of cave; deposit of calcite
Karst TopographyGroundwater EROSIONA sinkhole created when the roof of a cave collapses
GROUNDWATER CONT.
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PICTURES
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KARST TOPOGRAPHY
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•Loess•Created by Wind ___________•Fine, wind deposited sediment
•Sand Dune•Wind DEPOSITION•Found near beaches & deserts; hills of sand
FIND WIND…
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PICTURES
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•U-Shaped Valley•Glacial ____________•A valley scooped out by a glacier
•Kettle•Glacial _____________•Forms when a depression, left from glacial till, is filled in by melting ice.
FIND GLACIERS…
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MoraineGlacial ___________Formed where a glacier deposits mounds or ridges of till
GLACIERS CONT.
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PICTURES