Some way stations along the silk road

belonged to nomadic herders

had high population density

became modern cities

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.

Ahill is made of rock particles of different sizes. which of these agents of erosion probably caused the hill to form?

In stage 2 farmers used the land primarily to grow food for their families and their small communities.