Webrates gizmo models erosion in a simulated 3d landscape. Webexplore erosion in a simulated 3d environment. Observe how the landscape evolves over time as it is shaped by the forces of flowing water. Vary the initial landscape, rock type,. Weberosion gizmo, you will see how rivers move materials and how they affect landscapes. Erosion rates [note to teachers and students: We recommend doing those activities before trying this one. ] vocabulary: Webrates gizmo models erosion in a simulated 3d landscape.