chapter 3 lesson 2 Flashcards
1
Q
What are some properties of air?
A
pressure and density
2
Q
what is density
A
the amount of mass in a given volume of air
3
Q
what is air pressure
A
the result of the weight of a column of air pushing on an area
4
Q
why cant we feel the air pressure?
A
because the air pushes in all directions
5
Q
what are the two common types of barometers?
A
aneroid and mercury
6
Q
what is a mercury barometer?
A
consists of a long glass tube that is closed on one side and open on the other
7
Q
what is an aneroid barometer?
A
has an airtight water chamber
8
Q
national weather service maps indicate air pressures in
A
millibars
9
Q
A
10
Q
what is altitude
A
the distance above sea level
11
Q
air pressure descreases as altitude
A
increases
12
Q
as air pressure decreases,
A
so does density
13
Q
A
