Details

Title: 11-3 Air Pressure

Description: Chapter 11 Section 3

Total Flash Cards: 12

Created: 02/25/2009 18:57:28

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Term
Air has mass because it is
 Definition
composed of atoms and molecules
Term
Because air has mass it has ________ and ____________
 Definition
density and pressure
Term
The more molecules in a given volume of air the greater its ________
 Definition
density
Term
the less mass in a given volume of air the less ___________ the air
 Definition
dense
Term
Amount of mass in a given volume of air is its
 Definition
density
Term
What is the formula for density
 Definition
mass divided by volume = density
Term
an instrument that is used to measure changes in air pressure is
 Definition
barometer
Term
why are aneroid barometers often more practical than mercury barometers?
 Definition
they contain no liquid and are smaller, making them portablbe
Term
another word for elevation or distance above sea level is
 Definition
altitude
Term
in air pressure 30 inches is _____ millabars
 Definition
1,016 millabars
Term
air pressure increases as altitude decrease. true or false
 Definition
true
Term
true or false
the amount of oxygen is less at high altitudes
 Definition
true