5th Grade: Constructive and Destructive Forces

What is a destructive force?

• A natural process that destroys land
• A natural process that creates land
• A natural process where areas that are normally dry is covered in water

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A constructive force is defined as

• a natural occurrence that can build up or break down
• an earthquake or a volcano
• a natural force that builds up and creates new land
• a destructive force that has been controlled

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When the material that is worn down is carried away by wind, moving water, ice, living beings or gravity.

• Weathering 
• Erosion
• Deposition

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When those materials stop moving and build up somewhere else.

• Weathering
• Erosion
• Deposition

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A hill of sand, made and shaped by wind.

• Sand Dune
• Delta
• Fault
• Volcano

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An area of new land at the mouth of a river.

• Sand Dune
• Delta
• Fault
• Glacier

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A shaking of Earth’s surface, caused by movement of rock in the crust.

• Earthquake
• Volcano
• Tsunami

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A mountain that forms as molten rock flows through a crack into Earth’s surface.

• Volcano
• Earthquake
• Hill
• Sand Dune

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 Deposition is a process that

• Dissolves sediment
• Breaks down rock to form sediment
• Removes sediment from land forms
• Drops sediment to form landforms

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Where do deltas form?

• Desert Areas
• At river mouths
• On the Banks of Rivers
• In Valleys Formed by Glaciers

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