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8th Grade Ch 4

Weathering & Erosion

TermDefinition
a huge bowl shaped depression dug out by a valley glacier is a cirque
what is a natural ridge formed along the edge of a river's channel levee
Which type of weathering involves the breaking or peeling away of rock into layers exfoliation
a pillarlike structure of rock formed when the middle of a sea arch collapses is a sea stack
what is produced when a sea cave is eroded continually sea arch
the piles of debris left behind when a glacier melts are moraines
a low hill formed when a glacier overruns a moraine is a drumlin
the most important effect of wind erosion is deflation
Separates two river systems drainage divide
Stream that feeds into a river tributary
Sediment deposit extending from the mouth of a river into the sea delta
One of a series of winding, looping curves in a river meander
Gently sloping coasts covered by sand or pebbles beach
Large channel in the ground that cannot be repaired by ordinary cultivation: gully
The material carried by a stream load
Term for a region where limestone is exposed and abundant karst
Network of underground cavities caves
Triangular deposit formed by a short-lived desert stream alluvial fan
Thick ice sheet that slowly moves under its own weight glacier
High ridge of rock and land that projects out into the sea promontory
Water from rain that cannot be absorbed by the ground runoff
The eroding action of windblown sand abrasion
A mass of ice and snow abruptly dislodging from a mountain avalanche
A long pile of rocks deposited parallel to the shore breakwater
A glacial valley that has filled with seawater fjord
What is the source of a river called? headwaters
What is the process of planting alternate strips of erosion-prone crops with strips of erosion-preventing crops? strip-cropping
What are the 3 main types of dripstones in caverns? stalactite, stalagmite, column
Describe the process of the formation of sea caves, sea arches, and sea stacks. Waves erode rock cliffs which leads to sea caves. The back of the cave erodes away and causes sea arches. The top of the arch collapses and forms sea stacks.
What is physical weathering? The breakdown of large rocks into fragments by forces such as ice, changes in temperature, wind, or water.
What is chemical weathering? When rocks react chemically with air or water and the minerals weaken or dissolve.
What caused the Dust Bowl in the 1930’s? A severe drought which caused crops to not grow. There were no roots to hold the topsoil in place.
Created by: misschapman
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