Air pressure ______________ as altitude ___________________.
Atmospheric pressure is measured with a ______________________.
Air has weight.
As altitude increases, the amount of oxygen ______________
Which type of air pressure system leads to cloudiness, wind and precipitation?
Which type of air pressure system leads to fair, calm weather?
Isobars can be used to identify ______________________?
In the Northern Hemisphere, the wind blows ________________________ around centers of high pressure.
In the Northern Hemisphere, the wind blows _____________________________ around centers of low pressure.