What is the reason that different places on earth experience seasons at different times?
a. warmer temperatures caused by the greenhouse effect
b. the sun's distance from earth
c. earth's tilt and rotation
d. the effect of the sun's gravity on earth

7. according to the theory of isostasy, which statement must be true? a. the asthenosphere is denser than the lithosphere. b. the asthenosphere has the same density as the lithosphere. c. the lithosphere has the same density as the core. d. the lithosphere is denser than the asthenosphere.

Which of the following events did not occur as a result of china’s open-door policy? a. trade between japan and china was encouraged. b. all countries were given equal access to chinese ports. c. foreign influence in china increased. d. the influence of the communist party weakened.

Fossils of glossopteris, an extinct fern, were discovered on which continents to support the theory of continental drift? check all that apply.