Plz help me Pre-Lab Information

Purpose To model and observe stream processes, including factors that affect erosion and deposition
Time Approximately 45 minutes
Question What factors affect the power of a stream or river to cause erosion?
Summary In this lab, you will use a virtual model to observe stream behavior. You will model five scenarios involving a stream, and investigate the effect of water velocity, water volume, the stream slope, and the size of sediment on sand, pebbles, and various-sized rocks in a stream.
Lab Procedure
Prepare for the project.
Read through this guide before you begin, so you know the expectations for this lab.
If anything is not clear to you, be sure to ask your teacher.
Open the virtual lab.
Model a low-gradient, low-velocity stream.
Read the scenario.
You are on a research trip to observe pronghorn in the prairie grasslands of Colorado. As you observe a herd grazing next to a nearby stream, you notice storm clouds moving in overhead and feel rain beginning to fall. How does the stream act right now upon the objects in it?
Analyze the scenario and characterize the slope of the stream, the amount of rainfall, and the terrain of the area.
Press the “Go to the model.” button to open the modeling tool.
You can always return to the scenario by clicking the “?” button in the top-right corner.
On the left panel, choose the description for each parameter that would correctly model the scenario.
Press the “Check” button.
If all your descriptions are correct, proceed to step f.
If your descriptions are not all correct, analyze the scenario again and correct your descriptions. Click on the “Check” button. Do this step until all descriptions are correct. Then proceed to step f.
Observe what happens to the sand and pebbles in the stream.
When ready, press the “Pause” button and write your observations in the space below