Armando could use a physical or computer-based model that simulates erosion and water flow on hills of varying steepness. By adjusting the steepness of the hills in the model (for example, using adjustable legs to change the slope), Armando can observe how the width and depth of simulated rivers change. If the model consistently shows that steeper hills lead to rivers that are narrower and deeper, this would support the idea that very steep hills cause narrow, deep rivers. Specifically, Armando could:
- Set the model at different slope angles representing gentle to very steep hills.
- Introduce water flow to simulate river formation on these slopes.
- Measure and record the resulting river widths and depths for each slope.
- Analyze how changes in steepness affect river characteristics like width and depth.
This approach uses controlled experimentation within the model to test the hypothesis linking hill steepness with river shape and depth.