Transcript Weathering, Erosion, & Deposition

ConstructiveDestructive
Deposition
Forces
Forces
Weathering
Erosion
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Water, wind, ice & growing plants.
What is weathering?
The minerals in rocks are changed or
dissolved away.
What is chemical weathering?
Rocks are broken into smaller pieces
and the minerals remain the same.
What is mechanical weathering?
This causes rocks to crack resulting
in weathering.
What is freezing water?
Temperature changes, frost action,
root action & animal activity.
What are the four main causes of
weathering?
Carrying away of weathered
materials.
What is erosion?
Glaciers, wind..
What are two agents of erosion?
Glacier
What is a moving river of ice?
Sediment
What are tiny pieces of broken down
rock?
What is the greatest agent of
erosion?
What is moving water?
Pieces of eroded rock are dropped
into another place.
What is deposition?
Tiny pieces of broken down rock.
What is sediment?
New land where sediment is dropped
at the mouth of river .
What is a delta?
As it melts and shrinks, new
materials are deposited.
What is a glacier?
In addition to water, new land is
built as this deposits materials.
What is wind?
This process helps to build up the
earth’s landforms.
What are constructive forces?
These landforms were caused by the
very slow movement of the earth’s
crust.
What are mountains?
This type of mountain is created on
fault lines.
What is a fault block mountain?
This landform is created when land
is squeezed together.
What are fold mountains?
Besides mountains, these are the
main type of constructive force.
What are volcanoes?
These forces tear down the earth’s
landforms.
What are destructive forces?
These scrape the Earth’s surface and
act slowly to wear it away.
What is a glacier?
When the Earth’s plates collide,
these occur.
What is an earthquake?
These two forces combine water and
wind to change the Earth’s surface
quickly.
What are tornadoes and hurricanes?
This force, combined with rapidly
moving water, causes landslides.
What is gravity?