Gizmo Warm-up In the River Erosion Gizmo, you learned about the ways that rivers erode soil and change landscapes over time. The Erosion Rates Gizmo models erosion in a simulated 3D landscape. Using the Gizmo, you will see how quickly erosion happens and observe the long-term effects of erosion on a landscape. Click Play (). Wait for about 20,000 simulated years, then click Pause (). If you want, you can drag the landscape to rotate the view. How much does the landscape change