You searched for: “troposphere
The lowest and most dense layer of the atmosphere, extending 10 to 20 kilometers (6 to 12 miles), within which temperature decreases with rising altitude and where most nearly all cloud formations occur and weather conditions manifest themselves.

Most clouds and weather systems occur in the troposphere.

Word Entries at Get Words: “troposphere
The lower part of the atmosphere where living organisms spend most of their time and where weather takes place.

The troposphere averages about 7 miles (11 kilometers) in height. It is about 5 miles (8 kilometers) thick at the poles and about 10 miles (16 kilometers) thick at the equator.

This entry is located in the following unit: Meteorology or Weather Terms + (page 7)