Erosion + Soil Test Review

How are ice and plant roots weathering agents?

• They melt minerals in rocks.

• They grind and polish rock by moving particles against it.

• They expand within cracks in rock to break the rock apart.

• They are not weathering agents.

What happens when sediment eroded by water, ice, and wind slows down or stops moving?

• The sediment is deposited in a new location.

• The sediment continues to erode.

• The sediment instantly turns into soil.

• The sediment mixes with other sediment to become rock

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Where do erosion and deposition occur in a river?

• Erosion occurs where fast-moving river water picks up soil and moves it downstream. Deposition occurs where a river current slows as it enters a larger body of water and drops the soil

• Deposition occurs where fast-moving river water picks up soil and moves it downstream. Erosion occurs where a river current slows as it enters a larger body of water and drops the soil.

• A river erodes land. There is no deposition.

• A delta forms at the mouth of a river from deposition. There is no erosion

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Mechanical, or physical, weathering ____.

• breaks apart rocks by physical processes

• occurs when chemical reactions dissolve or change the minerals in rocks

• occurs when iron is exposed to oxygen and water

• none of the above

Chemical weathering ____.

• is caused by freezing and thawing

• breaks apart rocks by physical processes

• occurs when chemical reactions dissolve or change the minerals in rocks

• none of above

Name at LEAST two landforms formed by deposition.

• U-shaped valley

• Beach

• Sand dune

• V-shaped valley

• Fjord

This picture shows a rock formation, called a hoodoo, found in Arches National Park in Utah. Describe how wind contributed to shaping this rock formation.

• The wind dropped sediment there as it slowed down.

• The wind carried smaller sand with it and gradually wore away the sides of the hoodoo until it was smooth.

• On a very windy day, the wind blew away all the sand except the hoodoo.

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the dropping of sediments in layers. 

• compaction
• deposition
• erosion
• weathering

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the process by which running water, wind, or ice carry away bits of broken-up rock

• weathering
• sediment
• erosion
• cememtation

small, solid pieces of materials from rocks or living things

• sediment
• clastic rock
• organic rock
• deposition