OTS Elder Earth Forces and Structures

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OTS Elder 5th Grade Science Earth Forces and Structures Test Study Guide

Constructive Force

Forces that build new land-forms or changes by volcanic eruptions, sediment deposition, and earthquakes

Destructive Force

Forces that break up the land or destroy the land by erosion and weathering

Weathering

breaking down rocks into smaller pieces by ice, water, and gases

Chemical Weathering

changes the minerals inside of the rock

Physical Weathering

breaking the rock down without changing the minerals inside the rock.

Erosion

breaking down of the rocks and moving the rocks to different places, by running water, wind, sea waves, or glaciers

Sediment Deposition

rocks picked up and moved to different places by wind, water, and moving ice

Compression

Squeezes or pushes together the crust

Tension

stretches or pulls apart the crust

Sheer

twists, tears, or pushes one part of the crustpast another

Fault

a crack in the earths surface

What are two types of crust?

Continental and Oceanic crust

What 3 forces cause plate movement?

Compression, Tension, and Sheer

Which layer of the Earth contains the tectonic plates

Lithosphere

Which layer of the Earth contains hot magma that the plates float on

Asthenosphere

What is the name of the outermost layer of the Earth

Crust

What landform is created when sediment is deposited at the mouth of a river?

Delta

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