Erosion and Deposition: The Impact of Running Water on Earth's Surface

Ms. Block's video tutorial explores the processes of erosion and deposition by running water. It covers the factors influencing sediment movement, such as gradient and discharge, and explains how channel shape and meanders affect erosion and deposition. The video also discusses deposition at deltas, sediment sorting, and the stages of stream development. Key concepts include the role of gravity, the characteristics of sediments transported by streams, and the identification of erosion and deposition areas in meanders.

What is the primary role of running water in the context of erosion?

• To increase gravity

• To create glaciers

• To transport weathered sediments

• To deposit sediments

How does an increase in the gradient of a stream affect its velocity?

• It decreases the velocity

• It has no effect on the velocity

• It increases the velocity

• It stops the flow of water

What happens to the amount of erosion when the discharge in a stream increases?

• Erosion decreases

• Erosion remains the same

• Erosion increases

• Erosion stops completely

In a meandering stream, where does erosion primarily occur?

• In the middle of the stream

• At the delta

• On the outside of the meander

• On the inside of the meander

What is the relationship between the amount of water touching the stream banks and the stream velocity?

• Exponential relationship

• No relationship

• Inverse relationship

• Direct relationship

What type of sorting occurs at the delta when the stream velocity decreases significantly?

• No sorting

• Vertical sorting

• Random sorting

• Horizontal sorting

Which type of sediments are deposited first at the mouth of a stream?

• Boulders

• Clay and chemical sediments

• Dissolved ions

• Pebbles and cobbles

What is a characteristic feature of a younger stream?

• Steep gradient

• Wide floodplain

• Many meanders

• Slow velocity

How can you identify sediments that have been transported by running water?

• They are angular and large

• They are rounded and smoothed

• They are unsorted

• They are sharp and jagged

What shape of valley is typically formed by rivers and streams?

• Circular valley

• V-shaped valley

• Flat valley

• U-shaped valley