Troposphere - Wikipedia
The troposphere is the lowest layer of the atmosphere of Earth. Pronounced / ˈtrɒpəsfɪərˌ - poʊ -/, [1] the name comes from Ancient Greek τρόπος (trópos) 'turning, change' and - sphere. It contains 80% of …
The Troposphere - Center for Science Education
The troposphere is the lowest layer of Earth's atmosphere. Most of the mass (about 75-80%) of the atmosphere is in the troposphere. Most types of clouds are found in the troposphere, and almost all …
Atmosphere - Weather, Air Pollution, Climate | Britannica
Dec 17, 2025 · The lowest portion of the atmosphere is the troposphere, a layer where temperature generally decreases with height. This layer contains most of Earth’s clouds and is the location where …
Troposphere | NASA Space Place – NASA Science for Kids
Jun 28, 2019 · What is the troposphere? The troposphere is the innermost layer of Earth’s atmosphere. Closest to the surface of Earth, we have the troposphere. “Tropos” means change. This layer gets its …
TROPOSPHERE Definition & Meaning - Merriam-Webster
The meaning of TROPOSPHERE is the lowest densest part of the earth's atmosphere in which most weather changes occur and temperature generally decreases rapidly with altitude and which extends …
Troposphere - Simple English Wikipedia, the free encyclopedia
It extents up to 20 kilometers above the earth’s surface. It contains 75% of the atmosphere's mass and 99% of the total mass of water vapor and aerosols. This layer is rich in oxygen. The temperature …
What Is the Troposphere? - Earth How
The troposphere is the lowest layer of the atmosphere. It starts at ground level and extends upwards to about 13 km. All weather occurs in the troposphere.