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Lets go through what the 5 major agents of erosion are. 
Agents of Erosion
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Click words to Travel
Lets go through what the 5 major agents of erosion are.
Moving Water: Waves
Wind
Gravity
Moving Ice: Glaciers
Moving Water: Rivers & Streams

Agents of Erosion

Click words to Travel. When you click through all of them, and fill out your classwork- you may close the window.
Lets go through what the 5 major agents of erosion are.
Moving Water: Waves
Wind
Gravity
Moving Ice: Glaciers
Moving Water: Rivers & Streams

Agents of Erosion

How does Wind erode?
Wind can change the look of an entire landscape over time. One of the ways is called "deflation". This is when the wind blows away all the loose top layer of sand, revealing bigger rocks underneath.
OVER TIME

WIND

More Examples

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Sand will sometimes "blast" rock formations into shapes, like a "mushroom rock"

More Examples

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Sand will sometimes "blast" rock formations into shapes, like a "mushroom rock"
How ventifacts are formed
Mushroom rocks are a type of "ventifact". These are rocks that have been shaped by sandblasting.

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Wind erosion also creates sand dunes. Note the shape of the dune and which way the wind is blowing
Wind erosion also creates sand dunes.

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Where was the wind mostly hitting this mushroom rock?Click correct arrow to get home.
This image above is a time-lapse of a glacier "flowing"
How do glaciers erode?
Moving ice is a very forceful agent of erosion. Glaciers are huge rivers of ice and are usually moving very slowly. They carve out the ground underneath them.
Glaciers aid in the transportation of sediments
Glaciers weather the ground undeneath them through a process of "plucking"
What landscape features do glaciers make?
Examples of U- shaped Valleys
Altai Mountains, Central/East Asia
Cordillira Blanca, Peru

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when a glacier melts and creates an outwash plain
the creation of a u-shaped valley by a glacier
the transportation of glacial sediment
when a glacier pulls out chunks of rock from the ground it moves across
Return back to the main screen by clicking on the correct definition of "plucking".

Return

Return

GRAVITY

Gravity Erosion Formations & Events
Gravity shapes the Earth’s surface by moving weathered material from a higher place to a lower one. This can be a sudden, dramatic event or slow, steady movement over long periods of time. The force of gravity is constant.
Example: Landslides happen when rain weakens the soil and gravity pulls it all down

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gravity
Gravity will pull down weathered pieces of rock off of cliffs, altering their shape.

waves

Wave Erosion Formations
Waves shape the shoreline
Another major example of water shaping the Earth is through the action of
(roll over)
What are these formations called?
(roll over)
Sea Arches
Sea Stacks
Haystack rock is a famous sea stack shaped by wave erosion, located on a beach in the state of Oregon.
The southern shore of Long Island is protected by a string of barrier islands.

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Erosion & Deposition from waves also make barrier islands. These are long strips of sand that form long, thin islands.

Water is the most powerful erosional force on the planet. This can be moving liquid water, in the form of waves or rivers OR moving frozen water, like glaciers.

Water Erosion

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We will spend time talking about rivers & streams next week. Go back to learn about the other agents of erosion.