Which observation about the Rocky Mountains and the Appalachian Mountains would support the claim that exposure to weathering and erosion over time can change land forms? The Appalachian Mountains are found in the eastern United States and the Rocky Mountains are found near the west coast.

The shorter and more rounded Appalachian Mountains are more than four times older than the taller and more jagged Rocky Mountains.

The length of the Appalachican chain is approximately 2,400 kilometers, and the Rocky Mountain chain is about twice as long.

The Appalachian Mountains are composed mostly of sedimentary rocks while the Rocky Mountains also contain other rock types.