ScienceBoom » Air Pressure http://scienceboom.com Science Demonstrations, Projects, Experiments and Teaching Tips from ScienceBoom Wed, 28 Dec 2011 20:40:10 +0000 en hourly 1 http://wordpress.org/?v=3.3 ScienceBoom Episode #5 – Barometric Pressure and Temperature http://scienceboom.com/262/scienceboom-episode-5-barometric-pressure-and-temperature.htm http://scienceboom.com/262/scienceboom-episode-5-barometric-pressure-and-temperature.htm#comments Tue, 27 Oct 2009 14:01:15 +0000 Michael Doig http://scienceboom.com/262/scienceboom-episode-5-barometric-pressure-and-temperature.htm

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]]> Barometric pressure is responsible for much of our weather. In this episode, I travel to Hawaii so we can explore the relationship between barometric pressure and temperature.

Host: Michael Doig
Duration: 4:11

Materials

Can of Compressed AIr – Can be purchased at any office supply store for around $6.

Raytek MT4 Mini Infrared Thermometer – The ability to take the temperature of just about anything without touching it is amazing, not to mention entertaining. I took a reading of my desklamp and found out the bulb was 212?F, Wow!

Casio Men’s Pathfinder Triple Sensor Altimeter/Barometer/ Digital Compass Watch – For the money, this watch is a steal. Barometer, compass and thermometer all in one place. Great for hiking or scientific exploration. The manual is really dense, but operating the watch was relatively easy. My biggest problem was with the temperature, it was constantly bouncing around.

Barometric Pressure Fast Facts

  • A column of air one square inch in cross-section, measured from sea level to the top of the atmosphere, would weigh approximately 14.7 lbs per square inch or 1013.25 mb.
  • An increase in elevation results in a decrease in barometeric pressure.
  • As pressure decreases, temperature also decreases.

Special thanks to Mike Ogasawara and David Doig.


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]]> http://scienceboom.com/262/scienceboom-episode-5-barometric-pressure-and-temperature.htm/feed 5 ScienceBoom Episode #3 – Balloon in a Car http://scienceboom.com/91/scienceboom-episode-3-balloon-in-a-car.htm http://scienceboom.com/91/scienceboom-episode-3-balloon-in-a-car.htm#comments Mon, 11 Aug 2008 13:00:39 +0000 Michael Doig http://scienceboom.com/91/scienceboom-episode-3-balloon-in-a-car.htm

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]]> In this episode John Herrera and Michael Doig take a helium balloon along for a car ride to show how air moves within an accelerating car.


Watch on: YouTube | Revver | Vimeo | Download

Host: Michael Doig & John Herrera
Duration: 3:15

Materials

  • Car
  • Helium Balloon
  • Open Road

Convection Fast Facts

  • Lighter than air gases move from areas of high pressure toward areas of low pressure.
  • The highest air pressure is near the surface of Earth.
  • As you increase your altitude/elevation air pressure decreases.


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