4.31. Air Pressure and Altitude http://www.ck12.org
FIGURE 4.61
Q: Can you think of other ways that air pressure is useful?
A: You can see more examples of ways we use air pressure by watching the video at this URL:
http://www.youtube.com/watch?v=ZG29OJyZpyA
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/5026Summary
- The pressure exerted by the air in the atmosphere is greatest at Earth’s surface and falls as altitude increases.
The reason is that density and depth of the atmosphere are greatest at sea level and decline with increasing
altitude. - The pressure of air in the atmosphere allows us to do many things, from sipping through a straw to breathing.
Vocabulary
- pressure: Result of force acting on a given area.
Explore More
Select any five U.S. cities and at the first URL below, find their elevations (in meters) above sea level. If more than
one elevation is given for a city, choose just one. At the second URL below, find the atmospheric pressure (in kPa) at