Clouds form primarily at the boundary between:
A)the stratosphere and the mesosphere.
B)the mesosphere and the ionosphere.
C)the troposphere and the mesosphere.
D)the troposphere and the stratosphere.
E)the hydrosphere and the troposphere.

Question

Quizplus · Accepted Answer

Clouds form in the troposphere, which is the layer of the atmosphere closest to the Earth's surface, and the boundary between the troposphere and the stratosphere is where many clouds form. Therefore, choice D is the correct answer. Clouds form in the troposphere, the lowest layer of Earth's atmosphere, and can extend into the lower part of the stratosphere. So, they form primarily at the boundary between the troposphere and the stratosphere.

Clouds Form Primarily at the Boundary Between