What causes surface currents on the ocean?
a)rotation of earth
b)revolution of earth
c)wind
d)tides

What is the inability of an individual or a society to achieve a minimum standard of living known as ?

Several billion years ago which gas was the least prevailant in the atmosphere

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above