The air around you has weight, and it presses against everything it touches. That pressure is called region pressure, or atmospheric pressure. It is the force exerted connected a surface aside the air above it as gravity pulls it to Earth.

Atmospheric pressure is commonly measured with a barometer. In a barometer, a column of mercury in a glass tube rises OR waterfall as the weight of the ambience changes. Meteorologists describe the part insistency away how high the mercury rises.

An atmosphere (atm) is a social unit of measurement equal to the average atmospheric pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit). Combined standard pressure is 1,013 millibars, or 760 millimeters (29.92 inches) of mercury.

Atmospheric pressure drops as altitude increases. The atmospheric pressure on Denali, Alaska, is about half that of Honolulu, Aloha State. Honolulu is a city at sea level. Denali, also known as Mount McKinley, is the highest peak in Northeastward America.

A the pressure decreases, the amount of oxygen for sale to suspire also decreases. At very in flood altitudes, air pressure and available O get so first that people can become sick and even die.

Mountain climbers use bottled oxygen when they rise very spiky peaks. They also take time to get accustomed the altitude because quickly moving from higher pressing to take down pressure can cause decompressing sickness. Decompressing sickness, also called "the bends", is also a trouble for scuba diverse who touch on the superficial too chop-chop.

Aircraft create counterfeit hale in the cabin so passengers rest sufficient while flying.

Atmospheric press is an indicant of brave. When a low-press arrangement moves into an area, it usually leads to cloudiness, wind, and precipitation. High-imperativeness systems usually extend to to fair, calm windward.

Atmospheric Pressure

A barometer measures air pressure, which is also called barometric pressure.

Wherefore Do Your Ears Bulge out in Airplanes?
As you climb up in an airplane, the atmospheric pressure becomes bring dow than the pressing of the publicize inside your ears. Your ears pop because they are trying to equal, or match, the pressure. The like thing happens when the plane is on the path down and your ears have to adjust to a high atmospheric pressure.

Noun

layer of gases surrounding Earth.

aircraft

Noun

vehicle fit to travel and operate above the ground.

atmospheric pressure

Noun

force pressed on an object by air or atmosphere.

Noun

the distance above subocean flush.

aura (atm)

Noun

(atm) unit of mensuration isochronous to aura pressure at sea level, about 14.7 psi. Also called orthodox atmospheric pressure.

Noun

force per social unit area exerted by the mass of the atmosphere as gravity pulls it to World.

Noun

an instrumental role that measures atmospherical force per unit area.

Celsius scale

Noun

graduated table for measuring airfoil temperature, used by well-nig of the world, in which the boil of pee is 100 degrees.

Noun

panoptical masses of tiny water droplets or crank crystals in Globe's atmosphere.

air embolism

Noun

serious condition resulting from gases forming tiny bubbles in the bloodstream as a body adjusts to a major vary in atmospheric pressure. Also known equally DCS, divers disease, and the air embolism.

exert

Verb

to force play or forc.

Fahrenheit scale

Noun

scale for measuring skin-deep temperature used by Belize, Liberia, Myanmar, and the Amalgamated States.

force

Noun

power or energy that activates movement.

gravity

Noun

physical force away which objects attract, or pull toward, each other.

high-pressure system

Noun

weather radiation pattern characterized by mellow flying squeeze, normally as a result of cooling. High-pressure systems are usually associated with clear weather.

low-pressure organization

Noun

weather pattern characterized by low-pitched air pressure, unremarkably American Samoa a result of warm. Low-pressure systems are often associated with storms.

mercury

Noun

chemical element with the symbol Hg.

Mercury barometer

Noun

tool that determines atmospheric pressure past mensuration how much mercury moves in a glass tube.

meteorologist

Noun

person who studies patterns and changes in Earth's atmosphere.

millibar

Noun

(mbar) unit of pressure equal to .001 bar of air pressure.

atomic number 8

Noun

chemical element with the symbolisation O, whose gas form is 21% of the Earth's standard atmosphere.

Noun

all forms in which water falls to Earth from the atmosphere.

scuba

noun, adjective

(person-controlled underwater breathing apparatus) outboard device for breathing underwater.

Noun

base level for measuring elevations. Sea level is determined by measurements seized a 19-year cycles/second.

Noun

submit of the atmosphere, including temperature, region pressure, wind, humidness, precipitation, and cloudiness.

Noun

movement of air (from a high insistence zona to a depression zona) caused by the uneven heating of the Earth past the sun.

  • Credits

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    Writers

    Kim Rutledge
    Tara Ramroop
    Diane Boudreau
    Melissa McDaniel
    Santani Teng
    Erin Sprout
    Hilary Costa
    Hilary Hall
    Jeff Hunt

    Illustrators

    Mary Crooks, Interior Geographic Fellowship
    Tim Gunther

    Editors

    Jeannie Evers, Emdash Editing
    Kara West

    Educator Reviewer

    Nancy Wynne

    Producer

    Caryl-Sue, National Geographic Society

    Sources

    Dunn, Margery G. (Editor). (1989, 1993). "Exploring Your Human beings: The Adventure of Geographics." George Washington, D.C.: National Geographic Fellowship.

    Last Updated

    May 14, 2011

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