Transcript Erosion - TrueAmbition.net

Erosion: Shaping the Landscape
Pre-assessment
What do you think
happened to this rock?
Learning Objectives
Know what erosion is
Name the forces of erosion
Describe the action of erosion
Categorize types of erosion
What is Erosion?
Definition
Main Entry
ero·sion
Some agents of
erosion include:
i -'rO - zh&n
Function: noun
1.
2.
1.The wearing away
3.
and carrying off of
4.
rock, soil, sand, or
other, earth materials. 5.
Water
Wind
Gravity
Weathering
Human Activity
Water
the most power agent
of Erosion !!
Water can come in many forms.
Rain Drops, Storm-swollen rivers, Ocean waves,
Rushing Streams, Glaciers (compressed snow)
Wind
Wind is most important in areas where
there is little rain and very little or no
vegetation. (Beach, Desert, Prarie)
Wind erosion can be dangerous. In 1937
there were giant dust storms.
Gravity
The pull of gravity causes the downward
movement of materials.
This motion can be very slow. For example soil
being pulled down a hillside. The motion can also
be very fast like a mudslide.
Weathering
Weathering is the breaking down of rocks
or the Earth’s surfaces through chemical or
mechanical processes.
- Heating and cooling
- Plant Roots
- Pockets of Freezing Water
- Chemicals (Pollution, Acid Rain)
Human Activity
Industrial development
- Factories
- Automobiles
Poor agricultural (Farming) habits
- Polluted Runoff
- Removing of vegetation
Deforestation
-Cutting down of tress
The End?
The process of erosion both wears away and builds a new.
Nature is a balanced system. Even though mountains are
destroyed by erosion molten rock within the Earth rises
and creates new mountains.
Erosion might rob one area of soil but it is simply moving it
to another location.
When a river floods it leaves mineral deposits that help
plants grow.
When rocks are broken down they form sand and soil.
Activity
Explore How wind Shapes the Landscape
What happens when you blow the rice around in the pan?
Where might this type of erosion be found?
How does wind effect …
-Deserts?
-Mountain tops?
-Beaches?
-Sand dunes?
Closure
Erosion is the wearing away and carrying off of rock, soil, sand,
or other, earth materials.
The Forces of erosion are…
Water, Wind, Gravity, Weathering, Human Activity
The procession of erosion both wears away and builds the
environment.
Verdict…
More than likely the rock split
because of heating and
cooling.