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Chapter 2, Landform Changes
Landform Changes
12
Science
3rd Grade
10/20/2008

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Term
Mountain
Definition
A place on Earth's surface that is much higher than the land around it.
Term
Valley
Definition
A lowland area between higher lands such as mountains.
Term
Canyon
Definition
A deep valley with very steep sides.
Term
Plain
Definition
A flat area on the Earth's surface.
Term
Plateau
Definition
A flat area higher than the land around it.  They look like tables made of rocks.
Term
Barrier Island
Definition
A thin island near a coast. They have wide, sandy beaches.
Term
Weathering
Definition
The way rocks are broken down into smaller pieces.  Weathering always changes the surface of the Earth.
Term
Erosion
Definition
The movement of weathered rock and soil.
Term
Glaciers
Definition
Huge sheets of ice.  They form in places where it's so cold all year that the snow doesn't melt.
Term
Earthquake
Definition
The shaking of Earth's surface caused by movement of the crust where it meets the mantle.
Term
Volcano
Definition
An opening in Earth's surface from which lava flows.  Lava and ash then build up around the opening to form a mountain.
Term
Flood
Definition
A large amount of water that covers normally dry land.
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