Does magma contain only three elements

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 measure of humidity, relative humidity or dew point, best describes the actual quantity of water vapor in a mass of air

The net below can be folded to form a square pyramid.la2419"100what is the surface area of the pyramid? 190.8 square inches| 0 217.8 square inches300. 6 square inches354.6 square inches