Atmosphere of Earth - Wikipedia
Air composition, temperature and atmospheric pressure vary with altitude. Within the atmosphere, air suitable for use in photosynthesis by terrestrial plants and respiration of terrestrial animals …
The Chemical Composition of Air - ThoughtCo
2024年7月29日 · Nearly all of Earth's atmosphere (air) is comprised of a mere five gases: nitrogen, oxygen, water vapor, argon, and carbon dioxide. Several other compounds are also …
Earth’s Atmosphere Composition: Nitrogen, Oxygen, Argon …
From largest to smallest, Earth’s atmosphere composition contains nitrogen, oxygen, argon, CO 2, and trace gases. Because water vapor is highly variable geographically, it’s excluded from …
The Atmosphere | National Oceanic and Atmospheric Administration
2024年7月2日 · The atmosphere surrounds the Earth and holds the air we breathe; it protects us from outer space; and holds moisture (clouds), gases, and tiny particles. In short, the …
3.1: Structure and Composition of the Atmosphere
2023年1月21日 · Structure of the atmosphere. The main divisions of the atmosphere are defined by the elevations at which the sign of the temperature gradient changes. The chemical …
Air Mass/Density | NASA Earthdata
Air mass/density is a fundamental property of atmosphere. Mixture of gases forming Earth's atmosphere, consisting of nitrogen (∼78%), oxygen (∼21%), water vapor, and other trace …
Air | Composition, Oxygen, Nitrogen | Britannica
2024年11月5日 · Air, mixture of gases comprising the Earth’s atmosphere. The mixture contains a group of gases of nearly constant concentrations and a group with concentrations that are …
Composition and Structure of the Atmosphere
Earth’s atmosphere is divided into four distinct layers based on thermal characteristics (temperature changes), chemical composition, movement, and density (Figure 6.1). The …
What Is the Atmosphere? - Center for Science Education
Each of the planets in our solar system has an atmosphere, but none of them have the same ratio of gases or layered structure as Earth's atmosphere. Nitrogen and oxygen are by far the most …
Composition of the atmosphere - BBC Bitesize
The air in the atmosphere is a mixture of gases. Most of the atmosphere is nitrogen (80%) with around 20% oxygen and other trace gases.