Crude oil is separated into useful compounds by:
a. fractional distillation
c. electrolysis
b. differential cooling
d. compression

What is the reason for the “scramble for africa”?

Most of earths fresh surface water is found in

Compared with the land in the highlands, the lowlands region of england a) rockier and more difficult for farmingb) the center of business and industryc)richer in coal reservesd)covered by more fertile farmland d) covered by more fertile farmland