Weathering and Erosion.

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Weathering and Erosion.

• By Mallory, Manoj, and Brandon

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The two main external forces of change are

• Wind
  Water

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Weathering Erosion
The movements of wind and water include
weathering and erosion.
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Weathering

• Weathering is the process of which rocks
  break down into smaller pieces.

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Types of weathering

• Physical Biological
  Chemical

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Physical weathering.
Physical weathering is the breaking down of rocks
through direct contact.
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Chemical weathering

• Chemical weathering changes the actual chemical
  make-up of rocks.

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Types of chemical weathering

• Hydration Solution

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Hydration

• Hydration is when minerals in the rock absorb
  water and expand, creating stress which causes
  the disintegration of rocks.

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Solution

• Solution is a process by which minerals in the
  rocks dissolve directly in water.

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Erosion

• Erosion is the process that picks up and carries
  away broken off pieces of sediment

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Types of erosion
Wind Water
Glacial
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Water Erosion
Running water carves away the land much like a
glacier.
Water Erosion --?
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Water Erosion
The Grand Canyon
Mississippi River Delta
The Colorado River carved the walls of the canyon
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Glacial Erosion
Glaciers are huge masses of ice that carve the
land.
This is a glacier --?
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Glacial Erosion
An example of a Glacial valley.