Weathering, Deposition, Erosion Flashcards

1
Q

Weathering

A

the process that breaks down rock and other substances at Earth’s surface.

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2
Q

There are two types of weathering:

A
  1. Mechanical or Physical Weathering
  2. Chemical Weathering
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3
Q

Rocks are broken apart by physical processes such as:

A

▪ Heat/Pressure ▪ Water/Ice
▪ Plants/Animals ▪ Temperature

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4
Q

Mechanical Weathering

A

▪The overall chemical makeup of the rock stays the same
▪Each piece has characteristics similar to the original rock

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5
Q

Examples of Mechanical Weathering:

A

Frost Wedging, Biological Weathering, Burrowing animals, weathering can also occur by the rubbing of one object or surface against another [Abrasion].

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6
Q

Chemical Weathering

A

Chemical reactions dissolve or change the minerals in rocks or change them into different minerals [changes the chemical composition]

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7
Q

Examples of Chemical Weathering:

A

• Reaction with Air (Oxidation) • Reaction with Water/Rain
• Reaction with Acid
• Reaction with Organisms

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8
Q

Dissolution

A

Water coming in contact with rock a dissolves minerals.

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9
Q

Erosion

A

Erosion transports weathered rock
material.

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10
Q

Erosion by Gravity

A

Rocks and other materials, especially on steep slopes, are pulled toward the center of Earth by gravity.

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11
Q

Erosion by Wind

A

When air moves, it picks up loose material and transports it to other places.

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12
Q

Erosion by Water

A

When water moves, it picks up loose material and transports it to other places.

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13
Q

Deposition

A

•Deposition is the process in which sediment laid down in new locations.
•Water •Wind •Ice •Gravity

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14
Q

Deposition by Water

A

As water moves through a river, it loses some of its energy and it can no longer carry some of its sediment. As a result, it drops, or is deposited, to the bottom
of the stream.

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15
Q

Deposition by Wind

A

Sediments blown away by wind eventually are deposited. Over time, these deposits develop into landforms.

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16
Q

Deposition by Ice

A

When glaciers begin to melt, they deposit sediment on the land.

17
Q

Erosion by Gravity

A

•Gravity causes sediment to move downhill.
•It creates: landslides, mudflows, and creeps.