Where Is 99.9% of Earth's Atmosphere Located?
Discover that 99.9% of Earth's atmosphere is found within 50 kilometers above the surface, encompassing key atmospheric layers.
Video transcript
99.9% of the atmosphere is found within the first 50 kilometers (31 miles) above Earth's surface. This region includes the troposphere, stratosphere, and a part of the mesosphere, where most weather phenomena and human activities occur.
Questions and answers
What are the main layers of the atmosphere?
The main layers of Earth's atmosphere include the troposphere, stratosphere, mesosphere, thermosphere, and exosphere.
Why is most of the atmosphere found within 50 kilometers of Earth's surface?
Gravity pulls most air molecules close to Earth, concentrating 99.9% of the atmosphere within the lower layers, such as the troposphere and stratosphere.
What happens in the troposphere and stratosphere?
The troposphere is where weather occurs and humans live; the stratosphere contains the ozone layer which protects Earth from ultraviolet radiation.
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