Week 5: Lab: Modeling Water Erosion

Question 1

A stream table is a tool used to show how water causes erosion. Water from the left side of the table is added to model a stream.Suppose a block of wood is placed under the left edge of the table.Which characteristic of the stream is changed?

Revolt · Accepted Answer

gradient of the stream

Question 2

Which of these ideas did you include in your answer? Check all that apply.

Revolt · Accepted Answer

The lab activities allowed for the modeling, observation, and comparison of the factors that affect erosion.

Question 3

sediment Asediment Bsediment C

Revolt · Accepted Answer

sediment C

Question 4

sediment Asediment Bsediment C

Revolt · Accepted Answer

sediment A

Question 5

Suppose a block of wood is placed under the left edge of the table.

Revolt · Accepted Answer

There would be more erosion.; area B

Question 6

The Colorado river flows through the Grand Canyon.

Revolt · Accepted Answer

volume; February

Question 7

How did the lab activities help you answer the lesson question: What factors affect the power of a river to cause erosion? What conclusions can you make from your observations?

Revolt · Accepted Answer

The lab activities allowed me to see how different variables change the rate of erosion. By increasing the slope of the model river, I observed that the water velocity increased, which led to more sediment being moved and deeper channels being formed. Similarly, increasing the water volume increased the river's energy and its ability to transport larger materials. From these observations, I can conclude that factors such as the gradient (slope) of the land, the volume of water, and the velocity of the flow directly affect a river's power to cause erosion.

Week 5: Lab: Modeling Water Erosion Answers

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