Can you plese tell me something about the air around us? Inparagraph form please?

Answer 1

It contains roughly 78% nitrogen and 21% oxygen, trace amounts of other gases, and water vapor. This mixture of gases is commonly known as air.

Answer 2

The Earth's
Atmosphere

The present atmosphere of the Earth is probably not its original atmosphere. Our current atmosphere is what chemists would call an oxidizing atmosphere, while the original atmosphere was what chemists would call a reducing atmosphere. In particular, it probably did not contain oxygen.
Composition of the Atmosphere
The original atmosphere may have been similar to the composition of the solar nebula and close to the present composition of the Gas Giant planets, though this depends on the details of how the planets condensed from the solar nebula. That atmosphere was lost to space, and replaced by compounds outgassed from the crust or (in some more recent theories) much of the atmosphere may have come instead from the impacts of comets and other planetesimals rich in volatile materials.
The oxygen so characteristic of our atmosphere was almost all produced by plants (cyanobacteria or, more colloquially, blue-green algae). Thus, the present composition of the atmosphere is 79% nitrogen, 20% oxygen, and 1% other gases.
Layers of the Atmosphere
The atmosphere of the Earth may be divided into several distinct layers,

. The Troposphere
The troposphere is where all weather takes place; it is the region of rising and falling packets of air. The air pressure at the top of the troposphere is only 10% of that at sea level (0.1 atmospheres). There is a thin buffer zone between the troposphere and the next layer called the tropopause.
The Stratosphere and Ozone Layer
Above the troposphere is the stratosphere, where air flow is mostly horizontal. The thin ozone layer in the upper stratosphere has a high concentration of ozone, a particularly reactive form of oxygen. This layer is primarily responsible for absorbing the ultraviolet radiation from the Sun. The formation of this layer is a delicate matter, since only when oxygen is produced in the atmosphere can an ozone layer form and prevent an intense flux of ultraviolet radiation from reaching the surface, where it is quite hazardous to the evolution of life. There is considerable recent concern that manmade flourocarbon compounds may be depleting the ozone layer, with dire future consequences for life on the Earth.
The Mesosphere and Ionosphere
Above the stratosphere is the mesosphere and above that is the ionosphere (or thermosphere), where many atoms are ionized (have gained or lost electrons so they have a net electrical charge). The ionosphere is very thin, but it is where aurora take place, and is also responsible for absorbing the most energetic photons from the Sun, and for reflecting radio waves, thereby making long-distance radio communication possible.
The structure of the ionosphere is strongly influenced by the charged particle wind from the Sun (solar wind), which is in turn governed by the level of Solar activity. One measure of the structure of the ionosphere is the free electron density, which is an indicator of the degree of ionization. Here are electron density contour maps of the ionosphere for months in 1957 to the present. Compare these simulations of the variation by month of the ionosphere for the year 1990 (a period of high solar activity with many sunspots) and 1996 (a period of low solar activity with few sunspots):

Composition
ppmv: parts per million by volume
Gas Volume
Nitrogen (N2)780,840 ppmv (78.084%)
Oxygen (O2)209,460 ppmv (20.946%)
Argon (Ar)9,340 ppmv (0.9340%)
Carbon dioxide (CO2)381 ppmv
Neon (Ne)18.18 ppmv
Helium (He)5.24 ppmv
Methane (CH4)1.745 ppmv
Krypton (Kr)1.14 ppmv
Hydrogen (H2)0.55 ppmv
Not included in above dry atmosphere:
Water vapor (highly variable)typically 1%




Minor components of air not listed above include:
Gas Volume
nitrous oxide0.5 ppmv
xenon0.09 ppmv
ozone0.0 to 0.07 ppmv
nitrogen dioxide0.02 ppmv
iodine0.01 ppmv
carbon monoxidetrace
ammoniatrace

The mean molar mass of air is 28.97 g/mol.

Answer 3

The Earth's atmosphere has no definite boundary, slowly becoming thinner and fading into outer space. Three-quarters of the atmosphere's mass is contained within the first 11 km of the planet's surface. This lowest layer is called the troposphere. Further up, the atmosphere is usually divided into the stratosphere, mesosphere, and thermosphere. Beyond these, the exosphere thins out into the magnetosphere (where the Earth's magnetic fields interacts with the solar wind). An important part of the atmosphere for life on Earth is the ozone layer.

The atmospheric pressure on the surface of the Earth averages 101.325 kPa, with a scale height of about 6 km. It is 78% nitrogen and 21% oxygen, with trace amounts of other gaseous molecules such as water vapor. The atmosphere protects the Earth's life forms by absorbing ultraviolet solar radiation, moderating temperature, transporting water vapor, and providing useful gases. The atmosphere is one of the principal components in determining weather and climate.

Answer 4

Air may mean:

the mixture of gases present in the Earth's atmosphere
Air (classical element), one of the four classical elements
Air (music), French for "aria", various song-like vocal or instrumental compositions
Air de cour, secular vocal music in France in the late Renaissance and early Baroque period
Air (band), a French electronic music duo
AIR (Japanese band), a Japanese band
Air (jazz group)
Air (series), a Japanese video game, manga, and anime.
Air (novel), a novel by Geoff Ryman
Air (roller coaster), a flying roller coaster at Alton Towers theme park in the United Kingdom.
Air, the first "episode" of the movie End of Evangelion
a range of snowboarding tricks consisting of a jump without rotation
the Aïr Mountains, a massif in northern Niger
Air may also be a synonym for:

Broadcast
Air conditioning

Answer 5

air is a solution of different gasses wich is all around us.it is mostly nitrogen, and oxygen, but it has many other gases mixed in.