Historians trace the origins of a 24-hour day to
a) the aztecs.
b) the ancient egyptians.
c) the druids of stonehenge.
d) the babylonian astronomer, meton.
e) the mayans.

The prevailing climatic type in the southeastern part of the usa, western europe, southern brazil and northen argentina is the mid-latitude or: a)humid temperate b)humid cold c)semiarid moderate dry d)summer savanna.

Which layer surrounds the center of the earth? a: crust b: core c: mantle

Major river of southeast asia flowing through laos thailand vietnam and cambodia