Erosion by Water

Which agent of erosion could cause these rocks to have a smooth, round appearance such as those in the picture?

• ice

• wind

• water

• gravity

How do deltas form?

• A meander gets cut off

• deposition from flow into a lake or an ocean

• Soft rock erodes

• Flat areas flood

Which of the following statements is not true?

• Water causes more erosion on slopes without plants
• Water flows from higher to lower ground
• Faster water erodes more sediment
• As water slows, smaller particles are deposited first

The steeper the slope, the ________ the stream.

• Slower
• Broader
• Faster
• Curvier

The diagram below shows a section of a meander in a stream. The arrow shows the direction of stream flow. The stream bank on the outside of this meander is steeper than than the stream bank on the inside of this meander because the water on the outside of the meander is moving

• Slower, causing deposition
• Faster, causing deposition
• Slower, causing erosion
• Faster, causing erosion

The illustration below shows a meandering river moving toward the ocean. What most likely happens to the river in the area indicated by the arrow?

• The river is narrowed by mechanical weathering caused by increased rain water.

• The river slows down as it nears the ocean and deposits silt and sediment.

• The river will eventually completely fill in with soil.

• The river is widened by deposition.

The most dominant type of erosion is

• water

• wind

• gravity

• glaciers

Smaller streams that flow into larger streams are called

• tributary

• watershed

• river

• kettle lake

Which is NOT a factor that affects a stream's discharge?

• seasons

• climate

• weather

• how saturated the ground is

• size of stream channel

What type of erosion changes sediment from angular to rounded?

• stream abrasion

• deflation

• glacier plucking

• earthflow