Ch. 27 Flashcards

(78 cards)

1
Q

The process that involves the physical or chemical breakdown of materials on Earth’s surface…

A

Weathering

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2
Q

A mixture of weathered rock, organic matter, water, and air that is capable of supporting plant life.

A

Soil

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3
Q

The removal of surface material through the process of weathering…

A

Erosion

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4
Q

As rock weather, erosional agents like water, ice, wind, and gravity move eroded materials form one place to another is…

A

Sediment Transportation

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5
Q

When the erosional agent slows down or melts it drops this sediment load in a process called…

A

Deposition

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6
Q

The land area that gathers water for major river is called…

A

Drained Basin

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7
Q

The movement of water parallel to shoreline is…

A

Longshore Current

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8
Q

Weathering Definition

A

the process of physical or chemical breakdown of materials at or near Earth’s surface

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9
Q

Do rocks weather at the same rate?

A

No

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10
Q

What are the two main factors that determine how fast a rock will weather?

A

Rock type and landscape

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11
Q

What are the two types of weathering?

A

Mechanical and Chemical

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12
Q

What type of change happens with mechanical weathering?

A

Physical Changes

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13
Q

What type of change happens with chemical weathering?

A

Chemical Changes

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14
Q

What are the 3 specific types of mechanical weathering?

A

frost wedging, biochemical activity, and collisions

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15
Q

What causes frost wedging?

A

When water collects in the cracks of rock then freezes

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16
Q

What is the cycle called during frost wedging?

A

Freeze Thaw cycle

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17
Q

What causes biological activity?

A

plant and animal activity

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18
Q

What causes weathering during collisions?

A

when rocks fall from cliffs or in rivers

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19
Q

What are the two types of chemical weathering caused by?

A

Oxygen and Water

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20
Q

What is the chemical process called that is caused by oxygen?

A

Oxidation

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21
Q

What is the chemical process called that is caused by water?

A

hydrolysis

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22
Q

What is parent materials?

A

material from which soil forms

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23
Q

What are soil horizons?

A

different layers of soil

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24
Q

How many soil horizons are there?

A

six

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25
True or False, all soils contain every soil horizons?
False
26
What are the specific soil horizon?
O, A, E, B, C, and R
27
What does the first soil horizon contain?
organic material
28
What is the second horizon mostly made up of?
mostly minerals
29
Which layer does leaching occur?
the third
30
Which horizon collects materials from previous horizons?
Forth or B
31
Which layer is partially weathered bedrock?
C or 5th
32
Which layer is unweathered bedrock?
R or 6th
33
Which soil horizons make up the topsoil?
O & A
34
Which soil horizons make up the subsoil?
E & B
35
Which soil horizons make up the true soil?
O A E B
36
What is the difference between weathering and erosion?
Weathering- breakdown of materials | Erosion- removal of surface materials
37
If a slope of a river decreases what will happen to the river speed?
It decreases
38
Small streams that flow into larger rivers are called __
Tributaries
39
Land area that gathers water for a major river is called a __
Drainage Basin
40
A boundary that separates distinct drainage basins is called a __
Drainage Divide
41
As water flows downhill under the influence of gravity, water erodes earth's surface creating __
Channels
42
Young rivers are __ due to the fast movement
V-shaped
43
__ rivers are wide with smooth and gentle slopes
Mature
44
What type of landform is created when rivers flood and drop their sediment load?
Flood Plains
45
What is a fan shaped sediment deposit that forms at the mouth of a river?
Deltas
46
What are distributaries?
branching channels created by deltas
47
What is formed when the mouth of a stream enters dry land?
Alluvial Fans
48
What are the two types of glaciers?
Valley and Continental
49
Where do valley glaciers form?
High mountainous regions
50
Where do continental glaciers form?
Cold climates that occupy large land areas
51
Where are the two continental glaciers located?
Greenland and Antarctica
52
What is a cirque?
bowl shaped basins
53
What is an arete?
Long sharp ridgelines between valley glaciers
54
What is a horn in a mountainous region?
sharpened peaks
55
What shape of valley do valley glaciers form?
U shaped valleys
56
What are the tributary glaciers?
Small glaciers that feed into larger glaciers
57
What type of valleys do tributary glaciers form?
Hanging valleys
58
On which side of a sand dune does erosion occur?
Windward side
59
On which side of a sand dune does deposition occur?
Leeward side
60
What is deflation?
Removal of small particles from wind
61
What is desert pavement?
When all the small particles are removed
62
The shaped and sizes of landforms depends on?
wind speed, amount of time the wind blows, and sediment supply
63
What are 3 landforms created by wave erosion?
Coastal cliffs, sea arches, and sea stacks
64
What are two examples of wave deposition
Sand bars and sand spits
65
What are sand bars?
Landforms parallel to the shoreline
66
What are sand spit?
A sand bar that curves back to the land
67
What are some things that can cause mass wasting?
Snow, heavy rain, earthquakes, or human activity
68
What are some examples of mass wasting?
Rock slides, mudflows, and landslides
69
The process by which water enters Earth's surface and becomes groundwater below the surface
Infiltration
70
The upper boundary of the saturated zone is
water table
71
A rock unit that can transfer water through its pore space
aquifer
72
A material that is the percentage of the material's total volume that is pore space
Porosity
73
The process of assigning an exact numerical age to an organism, object, or event
Absolute Dating
74
The process of placing object or events in their proper order of time
Relative dating
75
This states that the law of nature operates today as they have in the pass
uniformitarianism
76
This states that in an undisturbed sequence of sedimentary rock layers, the youngest rock will be at the top and the oldest will be at the bottom
principle of superposition
77
Gaps in the rock record during which either erosion occured or deposition was absent
Unconformities
78
The remains or traces of organisms found in the geologic rock record
Fossils