CH. 7 Erosional Forces Flashcards

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1
Q

erosion

A

process that wears away surface materials and moves them from one place to another by agents such as gravity, glaciers, wind, and water

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2
Q

deposition

A

dropping of sediments that occurs when an agent of erosion loses its energy of motion and is no longer able to carry its load

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3
Q

mass movement

A

type of erosion in which gravity alone causes loose materials to move downslope and that can happen quickly or slowly

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4
Q

slump

A

mass movement that happens when loose materials or rock layers slip down a slope, and a carved scar is left where the slumped materials originally rested

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5
Q

creep

A

mass movement that occurs when sediments slowly inch their way down a hill and that is common in areas of freezing and thawing

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6
Q

glacier

A

moving masses of ice and snow that are responsible for creating many landforms on Earth through erosion and deposition

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7
Q

plucking

A

process that adds boulders, gravel, and sand to a glacier’s bottom and sides as water freezes and thaws and breaks off pieces of surrounding rocks

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8
Q

till

A

mixture of different-sized sediments dropped from the base of a slowing glacier and that can cover huge areas of land

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9
Q

moraine

A

ridge of material deposited in the middle and along the sides of a glacier

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10
Q

deflation

A

erosion caused by wind blowing across loose sediments, eroding only fine-grained particles such as clay and sand, and leaving behind coarse sediments

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11
Q

abrasion

A

erosion that occurs when wind-blown sediments strike rock, scraping that surface and wearing it away

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12
Q

loess

A

wind deposits of fine-grained, tightly packed sediments

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