dirt and rocks
They do change from erosion etc.
Erosion
Wind, water, glaciers, and gravity. Plant roots can also move around earth at the crust, too.
umm erosion?
Coastal erosion
It is called erosion.
It's erosion for one
erosion
Three major agents of erosion are water, wind, and ice. Water erosion is caused by rivers, streams, and rainfall washing away sediment and soil. Wind erosion occurs when strong winds move and transport particles of soil and rock. Ice erosion, or glacial erosion, happens when glaciers or ice sheets erode the land as they move and slide over the surface.
It wears down rocks first, then it rolls them around, causing them to bump, erode, and move to the next area in the cycle.
erosion
Glaciers