Describe forest ecosystem and the energy flow in the forest ecosystem

Why does physical weathering speed up the processes of chemical weathering? a) physical weathering requires abundant water, as does chemical weathering. b) physical weathering produces fresh surfaces for chemical weathering to attack. c) chemical weathering can occur only on small surfaces, not large ones. d) chemical weathering requires salt, which is provided by salt wedging.

Which objects allow humans to access groundwater? check all that apply.

What border separates sonora and chihuahua national border state border physical boundary natural boundary