Study the map of countries in Europe. A map of the countries of Europe. 4 countries are marked A, B, C, and D. A is next to Russia and Belarus. B is between Poland and the Netherlands. C is next to Switzerland and Belgium. D is next to Portugal. Which country is marked with the letter D?

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.

Distance that lewis and clark traveled from st. louis to ft. clatsop near the pacific ocean.

How does central place theory explain patterns in the size and distribution of cities?