What is a hemisphere? a. the line of longitude known as the prime meridian b. one-fourth of the area on earth c. the line of latitude known as the equator d. a half of the world, split by either the prime meridian or the equator

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.

How many countries have portuguese as a national language?

The magnitude of an earthquake is typically calculated according to the scale.           a. mercalli   b. fujita   c. richter   d. saffir-simpson