What is the meaning of atmosphere?

Question

Help please!!!

Answer 1

Earth's Atmosphere
The Earth is surrounded by a blanket of air, which we call the atmosphere. It reaches over 560 kilometers (348 miles) from the surface of the Earth, so we are only able to see what occurs fairly close to the ground. Early attempts at studying the nature of the atmosphere used clues from the weather, the beautiful multi-colored sunsets and sunrises, and the twinkling of stars. With the use of sensitive instruments from space, we are able to get a better view of the functioning of our atmosphere.

Life on Earth is supported by the atmosphere, solar energy, and our planet's magnetic fields. The atmosphere absorbs the energy from the Sun, recycles water and other chemicals, and works with the electrical and magnetic forces to provide a moderate climate. The atmosphere also protects us from high-energy radiation and the frigid vacuum of space.

The envelope of gas surrounding the Earth changes from the ground up. Four distinct layers have been identified using thermal characteristics (temperature changes), chemical composition, movement, and density.



Troposphere
The troposphere starts at the Earth's surface and extends 8 to 14.5 kilometers high (5 to 9 miles). This part of the atmosphere is the most dense. As you climb higher in this layer, the temperature drops from about 17 to -52 degrees Celsius. Almost all weather is in this region. The tropopause separates the troposphere from the next layer. The tropopause and the troposphere are known as the lower atmosphere.

Stratosphere
The stratosphere starts just above the troposphere and extends to 50 kilometers (31 miles) high. Compared to the troposphere, this part of the atmosphere is dry and less dense. The temperature in this region increases gradually to -3 degrees Celsius, due to the absorbtion of ultraviolet radiation. The ozone layer, which absorbs and scatters the solar ultraviolet radiation, is in this layer. Ninety-nine percent of "air" is located in the troposphere and stratosphere. The stratopause separates the stratosphere from the next layer.

Mesosphere
The mesosphere starts just above the stratosphere and extends to 85 kilometers (53 miles) high. In this region, the temperatures again fall as low as -93 degrees Celsius as you increase in altitude. The chemicals are in an excited state, as they absorb energy from the Sun. The mesopause separates the mesophere from the thermosphere.

The regions of the stratosphere and the mesosphere, along with the stratopause and mesopause, are called the middle atmosphere by scientists. This area has been closely studied on the ATLAS Spacelab mission series.

Thermosphere
The thermosphere starts just above the mesosphere and extends to 600 kilometers (372 miles) high. The temperatures go up as you increase in altitude due to the Sun's energy. Temperatures in this region can go as high as 1,727 degrees Celsius. Chemical reactions occur much faster here than on the surface of the Earth. This layer is known as the upper atmosphere.

The upper and lower layers of the thermosphere will be studied more closely during the Tethered Satellite Mission (TSS-1R).

Composition of the Atmosphere
The atmosphere is primarily composed of Nitrogen (N2, 78%), Oxygen (O2, 21%), and Argon (Ar, 1%). A myriad of other very influential components are also present which include the water (H2O, 0 - 7%), "greenhouse" gases or Ozone (O, 0 - 0.01%), Carbon Dioxide (CO2, 0.01-0.1%),

Beyond the Atmosphere
The exosphere starts at the top to the thermosphere and continues until it merges with interplanetary gases, or space. In this region of the atmosphere, Hydrogen and Helium are the prime components and are only present at extremely low densities.

Answer 2

The Earth is surrounded by a blanket of air, which we call the atmosphere. It reaches over 560 kilometers (348 miles) from the surface of the Earth, so we are only able to see what occurs fairly close to the ground. Early attempts at studying the nature of the atmosphere used clues from the weather, the beautiful multi-colored sunsets and sunrises, and the twinkling of stars. With the use of sensitive instruments from space, we are able to get a better view of the functioning of our atmosphere.

Life on Earth is supported by the atmosphere, solar energy, and our planet's magnetic fields. The atmosphere absorbs the energy from the Sun, recycles water and other chemicals, and works with the electrical and magnetic forces to provide a moderate climate. The atmosphere also protects us from high-energy radiation and the frigid vacuum of space.

The envelope of gas surrounding the Earth changes from the ground up. Four distinct layers have been identified using thermal characteristics (temperature changes), chemical composition, movement, and density.

Answer 3

a particular environment or surrounding influence; "there was an atmosphere of excitement"

standard atmosphere: a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade

the mass of air surrounding the Earth; "there was great heat as the comet entered the atmosphere"; "it was exposed to the air"
the weather or climate at some place; "the atmosphere was thick with fog"
the envelope of gases surrounding any celestial body

air: a distinctive but intangible quality surrounding a person or thing; "an air of mystery"; "the house had a neglected air"; "an atmosphere of defeat pervaded the candidate's headquarters"; "the place had an aura of romance"

Answer 4

Atmosphere is the general name for a layer of gases that may surround a material body of sufficient mass.[1] The gases are attracted by the gravity of the body, and are retained for a longer duration if gravity is high and the atmosphere's temperature is low. Some planets consist mainly of various gases, and thus have very deep atmospheres (see gas giants).

The term stellar atmosphere is used for the outer region of a star, and typically includes the portion starting from the opaque photosphere outwards. Relatively low temperature stars may form compound molecules in their hot outer atmosphere.

Answer 5

There is no "meaning" to the atmosphere. It just is, like the universe. Things don't rely on the humans only idea of "meaning" to exist. Animals don't know the "meaning" of existence. They just eat, breathe, breed, excrete waste, and try to escape being something's dinner as long as they can.
Very simply: Atmosphere=life. No atmosphere=no life. And of course, the sun provides necessary warmth, and does so without "meaning" anything.

Answer 6

1 a: the gaseous envelope of a celestial body (as a planet) b: the whole mass of air surrounding the earth
2: the air of a locality
3: a surrounding influence or environment
4: a unit of pressure equal to the pressure of the air at sea level or approximately 14.7 pounds per square inch (101,325 pascals)
5 a: the overall aesthetic effect of a work of art b: an intriguing or singular tone, effect, or appeal
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Answer 7

basically it is the gaseous debree in orbiting around earth. It gets recycled from evaporation, condensation, precipitation, etc. Atmosphere gives our planet heat, holds in heat. Its like a big blanket over earth. It relates to greenhouse gases. Global warming is an issue related with atmoshpere, our atmosphere makes it difficult for greenhouse gases to escape. So the greenhouse gases stay on earth and heat the surface of earth up, which leads to melting glaciers, then a rise in sea level. Just go to wikipedia.org and type in atmosphere.

Answer 8

atmosphere is a layer of air or gases which envelopes the earth and protects it from harmful rays of the sun

Answer 9

'Atmosphere' usually refers to the gaseous part of an environment. But but the word is also used as a measure of pressure equal to one 'standard' Earth atmosphere (14.696 pounds/sq. inch).

HTH ☺

Doug

Answer 10

atmosphere is the envelope of air that surrounds the earth.