30. In the United States House of Representatives there are a fixed number of 435 seats divided among the states based upon each state’s relative population size. Changes in the number of representatives, as shown on the map, affect politics at which of the following scales? *

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.

Eastern europe’s population growth can be attributed to these factors. select all that apply migration

Which layer surrounds the center of the earth? a: crust b: core c: mantle