Structure and Composition of the Atmosphere
The atmosphere extends approximately 10,000 kilometers into space, consisting of multiple layers with distinct characteristics and functions. The troposphere, extending 10-12 kilometers upward, is where most weather phenomena occur and contains the air we breathe.
Definition: The atmosphere is the gaseous layer surrounding Earth, held in place by gravity and composed primarily of nitrogen, oxygen, and other gases.
Highlight: The atmosphere's composition is crucial for life: 78.1% nitrogen, 21% oxygen, and 1% other gases including carbon dioxide and argon.
Example: The troposphere contains most of Earth's weather phenomena, including cloud formation, precipitation, and wind patterns.
Vocabulary: Troposphere - The lowest layer of Earth's atmosphere where most weather phenomena occur.