Weathering, erosion, deposition

The photograph below shows scratched and polished bedrock produced by weathering and erosion. Which agent of erosion most likely carried sediment that scratched and polished this bedrock surface?

• A moving glacier
• Running water
• Wave action
• Wind

The block diagram below represents caves that developed in a region over time. Which type of weathering was primarily responsible for the development of these caves?

• Physical weathering of sandstone
• Physical weathering of limestone
• Chemical weathering of sandstone
• Chemical weathering of limestone

Photographs A and B below show two different valleys. Which list best identifies the agent of erosion that primarily determined the shape of each valley?

• Photograph A—glacier; photograph B—river
• Photograph A—river; photograph B—glacier
• Both photographs—river
• Both photographs—glacier

Which cross section best represents the valley shape where a rapidly flowing stream is cutting into the bedrock in a mountainous area?

• 1
• 2
• 3
• 4

The photograph below 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

The natural sandblasting (abrasion) of surface bedrock in a desert region is the result of

• Wind erosion
• Wave erosion
• Mass movement
• Chemical precipitation

Which diagram represents a side view of a sand dune most commonly formed as a result of the prevailing wind direction shown?

• 1
• 2
• 3
• 4

The chunks of bedrock removed by glacial quarrying and transported by the glaciers most likely produce

• terminal outwash plainsOption 1*
• kettle lake depressions 
• V-shaped valleys
• parallel scratches in surface bedrock

The cross section below represents a portion of a meandering stream. Points X and Y represent two positions on opposite sides of the stream. Where does erosion occur?

• X
• Y
• X and Y
• Midpoint between X and Y

Base your answers to questions 86 and 87 on the block diagram below and on your knowledge of Earth science. The block diagram represents a landscape that was produced by a meandering stream. One landscape feature is labeled X. Letters A, B, C, and D represent locations on the stream banks. The landscape feature labeled X is best described as

• a flood plain
• a sand bar
• a delta
• an escarpment