The Quiz: Clouds typically occur in the lowest layer of Earth’s atmosphere. What’s that layer called?
From the Earth’s surface to between 5 and 9 miles up into the air, the troposphere is where much of Earth’s weather happens, so most of the clouds form there. But the rare noctilucent clouds seen in this image are way up in the mesosphere, the coldest layer of our atmosphere, about 50 miles above the surface.
The correct answer to this quiz is Troposphere.