CH. 7 Erosional Forces

Question 1

erosion

Answer 1

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

Question 2

deposition

Answer 2

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

Question 3

mass movement

Answer 3

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

Question 4

slump

Answer 4

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

Question 5

creep

Answer 5

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

Question 6

glacier

Answer 6

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

Question 7

plucking

Answer 7

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

Question 8

till

Answer 8

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

Question 9

moraine

Answer 9

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

Question 10

deflation

Answer 10

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

Question 11

abrasion

Answer 11

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

Question 12

loess

Answer 12

wind deposits of fine-grained, tightly packed sediments