Unit 6: Changes to Earth's Surface

Deposition means...

• The height of the land above sea level.
• The dropping or settling of eroded materials.
• The process of moving sediment from one place to another.
• The breaking down of rocks on Earth's surface into smaller pieces.

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A deep valley in the ocean floor is called...

• ocean trench
• ocean valley
• deep sea
• sea level

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The breaking down of rocks on Earth’s surface into smaller pieces.

• receptor
• erosion
• deposition
• weathering 

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The process of moving sediment from one place to another.

• receptor
• erosion
• deposition
• weathering 

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elevation is..

• The height of the land above sea level.
• A machine to stand in.
• A device that flies in the sky.
• To rise above the rest of the population.

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When a river flows over the Earth and carves out a hole in the surface it makes a 

• hill
• mountain
• canyon

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What natural force formed the Grand Canyon millions of years ago?

• a landslide
• an earthquake
• a river

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Water getting into cracks, freezing, and breaking rocks is an example of

• weathering
• erosion
• deposition
• all of the above

Why do farmers plant cover crops in empty fields?

• They will have more crops to harvest.
• The roots will hold the soil in place during storms.
• The crops will cause weathering.
• The crops will take all the nutrients from the soil.

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How do these plants slow erosion caused by heavy rains?

• Plant roots don't absorb water from the wet soil.
• Plant roots hold soil particles together.
• Plants' leaves release water from the soil into the air.
• Plant roots decrease moisture evaporation from the soil.