Glaciers part 2

_____ is the removal of large chunks of rock debris during glaciation

• Plucking

• Abrasion

• Weathering

• Erosion

_____ are parallel scratch marks on bedrock

• Plucking
• Abrasion
• Straitions
• Till

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NGSS.MS-ESS2-2

The photograph shows scratched and grooved

bedrock with boulders on its surface. The scratches and grooves were most likely created when

• alternating thawing and freezing of water cracked the bedrock

• flooding from a nearby lake covered the bedrock

• a glacier dragged rocks over the bedrock

• rocks from a landslide slid along the bedrock

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NGSS.MS-ESS2-2

The photograph shows both erosional and depositional features formed by an agent of erosion. Which agent of erosion produced the features shown in the photograph?

• running water

• glacial ice

• ocean waves

• prevailing wind

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NGSS.MS-ESS2-2

Base your answer to the following question on the map. Arrows on the map show the location and orientation of glacial striations on the surface bedrock. Dark shading shows the location of large moraines (glacial deposits). How were the striations made?

• Frost action cracked the bedrock during the ice age.

• Rocks at the bottom of the glaciers were dragged over the bedrock.

• Particles carried by winds scratched the bedrock during the ice age.

• Particles carried by glacial meltwater eroded the bedrock.

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NGSS.MS-ESS2-2

Which landscape feature was most likely formed by glacial activity?

• an eroded plateau

• a flat floodplain

• a U-shaped valley

• a V-shaped valley

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NGSS.MS-ESS2-2

glacial erosion causes ______ as it moves across the land?

• plucking and striations
• beaches and sand bars
• sea caves and headlands
• sand dunes and losses

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NGSS.MS-ESS2-2

A sharp, pyramid shaped peak formed by glacial erosion

• Horn

• Arete

• Cirque

• Erratic

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NGSS.MS-ESS2-2

This is an example of a ____________.

• V-shaped river valley

• continental glacier

• U-shaped valley

• cirque

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NGSS.MS-ESS2-2

Why is the glacier so dirty?

• The glacier picks up rocks and transports it to the top of the glacier.

• Rocky debris fall off the steep sides of the mountains and accumulate on the top of the glaciers.

• The glacier carries debris as it moves and small sediment like sand is blown via wind to the top of the glacier.

• All of the above

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NGSS.MS-ESS2-2

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