The boundary between the troposphere and stratosphere is called:

a. thermopause.
b. mesopause.
c. stratopause.
d. tropopause.

On nights when we see the new moon phase, what side of the moon are we seeing?

At which boundary does subduction stop occurring, resulting in a mountain range?

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