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About Air Pressure
Air pressure is defined by Webster's dictionary as the weight of air calculated by the force exerted per unit area. Although this formula is probably foreign to most people, the uses for air pressure are not. Air pressure is used to blow up tires, pump... More »
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Source: www.ehow.com

en.wikipedia.org/wiki/Atmospheric_pressure

Atmospheric pressure, sometimes also called barometric pressure, is the pressure within the atmosphere of Earth In most circumstances atmospheric pressure is ...

www.srh.noaa.gov/jetstream/atmos/pressure.html

Air pressure can be increased (or decreased) one of two ways. First, simply adding molecules to any particular container will increase the pressure. A larger  ...

www.kids-fun-science.com/what-is-air-pressure.html

Measuring air pressure on island of Hawaii. ... Meteorologists use barometers to measure the pressure of the air when making weather forecasts and studying ...

extension.illinois.edu/treehouse/airpressure.cfm?Slide=1

We don't think about it, but we are actually living at the bottom of a large pool of air. This large pool of air is called the atmosphere. It is made up of mostly ...

www.britannica.com/science/atmospheric-pressure

Atmospheric pressure, also called barometric pressure, force per unit area exerted by an atmospheric column (that is, the entire body of air above the specified ...

extension.illinois.edu/treehouse/airpressure.cfm?Slide=3

An instrument that measures air pressure is called a barometer. One of the first barometers was developed in the 1600s. The original instrument had mercury in  ...

scied.ucar.edu/webweather/weather-ingredients/pressure

Air molecules constantly bounce off each other and everything else around them. The force exerted by these air molecules is called air pressure. Where air ...

www.nationalgeographic.org/encyclopedia/atmospheric-pressure

May 14, 2011 ... The air around you has weight, and it presses against everything it touches. That pressure is called atmospheric pressure, or air pressure.

www.ask.com/youtube?q=Air+Pressure&v=jmQ8FWnM0fA
Jun 1, 2011 ... Why the air in the upper-atmosphere stay so cold yet is expanded like hot air still ? I didn't see this go over in the video.. Read more. Show less.