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.

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

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