Are the gcf of any two even numbers is always even true or false

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.

The african continent is home of the worlds largest desert and longest river . t or f

What is the famous rainforest in costa rica called?