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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.
Atmosphere - Wikipedia
Atmospheres are clouds of gas bound to and engulfing an astronomical focal point of sufficiently dominating mass, adding to its mass, possibly escaping from it or collapsing into it.
Atmosphere of Earth - Simple English Wikipedia, the free …
It is held in place by Earth's gravity. It is today made up mainly of nitrogen (78.1%). It also has plentiful oxygen (20.9%) and small amounts of argon (0.9%), carbon dioxide (~ 0.035%), water vapor, and other gases. The atmosphere protects life on Earth by absorbing (taking) ultraviolet rays from the Sun.
Greenhouse gas - Wikipedia
Greenhouse gases (GHGs) are the gases in the atmosphere that raise the surface temperature of planets such as the Earth. What distinguishes them from other gases is that they absorb the wavelengths of radiation that a planet emits, resulting in the greenhouse effect. [ 1 ] .
Air - Simple English Wikipedia, the free encyclopedia
Air is a mixture of many gases and tiny dust particles. It is the clear gas in which living things live and breathe. It has an indefinite shape and volume. It has mass and weight, because it is matter. The weight of air creates atmospheric pressure. There is no air in outer space.
Atmosphere - Simple English Wikipedia, the free encyclopedia
An atmosphere is a layer of gases that create an astronomical object, that is held in place by the gravity. [1] A planet has an atmosphere when the gravity is great and the temperature of the atmosphere is low.
Air | Composition, Oxygen, Nitrogen | Britannica
Nov 5, 2024 · 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 variable in both space and time. The atmospheric gases of steady concentration (and their proportions in percentage by volume)
Earth’s Atmosphere Composition: Nitrogen, Oxygen, Argon and …
From largest to smallest, Earth’s atmosphere composition contains nitrogen, oxygen, argon, CO2 and trace gases. Water vapor is excluded from this total.
What Is the Atmosphere? - Center for Science Education
The atmosphere is a mixture of gases that surrounds the Earth. It helps make life possible by providing us with air to breathe, shielding us from harmful ultraviolet (UV) radiation coming from the Sun, trapping heat to warm the planet, and preventing extreme temperature differences between day and night.
Atmosphere - Education | National Geographic Society
Earth’s atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases. These gases are found in atmospheric layers (troposphere, stratosphere, mesosphere, thermosphere, and exosphere) defined by unique features such as temperature and pressure.
Gas - Wikipedia
Gas is one of the four fundamental states of matter. The others are solid, liquid, and plasma. [1] A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide).
What Is... Earth's Atmosphere? - NASA
May 13, 2024 · That is essentially what the Earth’s atmosphere is like: layers upon layers of gas surrounding the Earth, working to protect the planet. We asked Rei Ueyama , an atmospheric scientist at NASA Ames Research Center, to explain a little bit more about the function and importance of our atmosphere.
The Atmosphere | National Oceanic and Atmospheric Administration
Jul 2, 2024 · Introduction to the Atmosphere The atmosphere is a layer of gas and suspended solids extending from the Earth's surface up many thousands of miles, becoming increasingly thinner with distance but always held by the Earth's gravitational pull.
Atmosphere | Definition, Layers, & Facts | Britannica
Nov 15, 2024 · atmosphere, the gas and aerosol envelope that extends from the ocean, land, and ice -covered surface of a planet outward into space.
Carbon dioxide - Wikipedia
Carbon dioxide is a chemical compound with the chemical formula CO 2.It is made up of molecules that each have one carbon atom covalently double bonded to two oxygen atoms. It is found in the gas state at room temperature and at normally-encountered concentrations it is odorless. As the source of carbon in the carbon cycle, atmospheric CO 2 is the primary carbon …
Atmospheric chemistry - Wikipedia
Atmospheric chemistry is a multidisciplinary field with wide-ranging applications that influence environmental policy, human health, technology development, and climate science. Examples of problems addressed in atmospheric chemistry include acid rain, ozone depletion, photochemical smog, greenhouse gasses and global warming. By developing a ...
Earth’s atmosphere - Met Office
Air is made up of a mixture of different gases. The principal constituents of Earth’s atmosphere are: As well as these, there are various trace gases at relatively low concentrations measured...
What is the greenhouse effect? - NASA Science
Greenhouse gases are part of Earth's atmosphere. This is why Earth is often called the 'Goldilocks' planet – its conditions are just right, not too hot or too cold, allowing life to thrive. Part of what makes Earth so amenable is its natural greenhouse effect, which maintains an average temperature of 15 ° C (59 ° F) .
Atmospheric carbon cycle - Wikipedia
The atmospheric carbon cycle accounts for the exchange of gaseous carbon compounds, primarily carbon dioxide (CO 2), between Earth's atmosphere, the oceans, and the terrestrial biosphere.
Noble gas - Wikipedia
The noble gases have also been referred to as inert gases, but this label is deprecated as many noble gas compounds are now known. [6] Rare gases is another term that was used, [7] but this is also inaccurate because argon forms a fairly considerable part (0.94% by volume, 1.3% by mass) of the Earth's atmosphere due to decay of radioactive ...
Standard temperature and pressure - Wikipedia
The molar volume of gases around STP and at atmospheric pressure can be calculated with an accuracy that is usually sufficient by using the ideal gas law. The molar volume of any ideal gas may be calculated at various standard reference conditions as shown below: V m = 8.3145 × 273.15 / 101.325 = 22.414 dm 3 /mol at 0 °C and 101.325 kPa
Methane - Wikipedia
Methane (US: / ˈ m ɛ θ eɪ n / METH-ayn, UK: / ˈ m iː θ eɪ n / MEE-thayn) is a chemical compound with the chemical formula CH 4 (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas.The abundance of methane on Earth makes it an economically attractive fuel, although capturing and storing it is …
Greenhouse gas emissions - Wikipedia
Greenhouse gas emissions per person in the highest-emitting countries. [1] Areas of rectangles represent total emissions for each country. Greenhouse gas (GHG) emissions from human activities intensify the greenhouse effect.This contributes to climate change. Carbon dioxide (CO 2), from burning fossil fuels such as coal, oil, and natural gas, is the main cause of climate …
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