Atmosphere of Earth - Wikipedia
The atmosphere of Earth is composed of a layer of gas mixture that surrounds the Earth's planetary surface (both lands and oceans), known collectively as air, with variable quantities of suspended aerosols and particulates (which create weather features such as clouds and hazes), all retained by Earth's gravity.
Composition and Structure of the Atmosphere – Environmental …
Earth’s atmosphere is divided into four distinct layers based on thermal characteristics (temperature changes), chemical composition, movement, and density (Figure 6.1). The troposphere is the lowest layer extending from the surface up to roughly 18 km above the surface depending on location (varies from as low as 6 km to as high as 20 km).
3.1: Structure and Composition of the Atmosphere
2023年1月21日 · The atmosphere acts as a compressible fluid tied to the earth by gravitation; as a receptor of solar energy and a thermal reservoir, it constitutes the working fluid of a heat engine that transports and redistributes matter and energy over the entire globe.
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 this total.
Composition of the atmosphere - BBC Bitesize
Our planet is surrounded by an invisible shell of air, called the atmosphere, held in place by the Earth’s gravitational field. It’s made up of a mixture of different gases. About 78% of the...
Atmosphere - Wikipedia
The atmosphere of Earth is composed of layers with different properties, such as specific gaseous composition, temperature, and pressure. The troposphere is the lowest layer of the atmosphere. This extends from the planetary surface to the bottom of the stratosphere .
The Atmosphere | National Oceanic and Atmospheric Administration
2024年7月2日 · In short, the atmosphere is the protective bubble in which we live. This protective bubble consists of several gases (listed in the table below), with the top four making up 99.998% of all gases. Of the dry composition of the atmosphere, nitrogen by far is the most common.
Atmosphere | Definition, Layers, & Facts | Britannica
2025年1月6日 · The current molecular composition of Earth’s atmosphere is diatomic nitrogen (N 2), 78.08 percent; diatomic oxygen (O 2), 20.95 percent; argon (A), 0.93 percent; water (H 2 0), about 0 to 4 percent; and carbon dioxide (CO 2), 0.04 percent.
Carbon dioxide is supplied into the atmosphere by plant and animal respiration, the decay of organic material, volcanic eruptions, and natural and anthropogenic combustion. Carbon dioxide is removed from the atmosphere by photosynthesis. CO2 is an important greenhouse gas. Aerosols: small solid particles and liquid droplets in the air.
Atmosphere - Education | National Geographic Society
2023年10月19日 · Earth’s atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases. Trace amounts of carbon dioxide, methane, water vapor, and neon are some of the other …