Weathering, Erosion And Deposition

Front 1

weathering

Back 1

when earth materials break down

Front 2

physical weathering

Back 2

when the size or shape of a material changes

Front 3

chemical weathering

Back 3

when the material changes composition or decomposes

Front 4

frost-action

Back 4

when water expands because it freezes. A freeze/thaw cycle promotes rapid weathering

Front 5

abrasion

Back 5

the weathering down of rocks or particles as they rub or bounce against other rocks

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exfoliation

Back 6

peeling away of large sheets of loosened material at the surface of a rock

Front 7

hydrolysis

Back 7

the change in a material caused by contact with water (ex. rust)

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carbonation

Back 8

the change in a material caused by contact with carbonic acid

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sol

Back 9

mixture of sediment and humus

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humus

Back 10

partly decayed organic material

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residual soils

Back 11

form from weathering of the local bedrock. their mineral composition will be similar to the underlying rock

Front 12

transported soils

Back 12

form from weathering in a different location and are moved in by wind, streams, glacier and trucks

Front 13

erosion

Back 13

the loosening and transport of weathered material

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gravity

Back 14

force behind erosion

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streams

Back 15

create v-shaped valleys

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discharge

Back 16

volume flowing past a point

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youthful

Back 17

fast, steep, slopes, mountain streams with waterfalls and rapids

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mature

Back 18

on Piedmont with gentle slopes, slower streams, and meanders flowing through wide valleys

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old age

Back 19

in plains with almost flat slopes, very slow streams, meanders with oxbow lakes, very wide flood plains

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meanders

Back 20

curved path of a river

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oxbow lakes

Back 21

cut off meander loops

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flood plains

Back 22

a flat cross section...valley shape

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source

Back 23

beginning

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kinetic energy

Back 24

the energy of MOTION

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potential energy

Back 25

the energy of POSITION

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mouth

Back 26

where the river empties into the ocean or lake

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dunes

Back 27

a sand hill or sand ridge formed by the wind

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sorted

Back 28

when materials are organized by size, density or shape

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desert pavement

Back 29

forms when the smaller sediments are blown away and the larger pieces are left on the surface

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ventifact

Back 30

forms when wind shapes a rock into a pyramidal form

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glaciers

Back 31

act like rivers of ice

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alpine

Back 32

mountain glaciers

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u-shaped valleys

Back 33

valleys in the shape of a u

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till

Back 34

the pile of sediment deposited by a glacier

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moraine

Back 35

a hill of sediment formed when the glacier pushes downhill

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drumlin

Back 36

a canoe shaped hill

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kettle

Back 37

steep sided depression formed when a chunk of ice falls off the glacier, gets buried by sediment, and then melts

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sorting

Back 38

occurs when sediments are separated

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graded beds

Back 39

sorted by size

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varves

Back 40

thin layers deposited seasonally in lakes