air pressure notes

Atmosphere Notes
Video Notes
A weather ____________ is the boundary between two bodies of ____________ that have different
_______________ and humidity.
These differences depend on where the __________ is coming from on the globe.
If the warm air is stronger than the ___________ air, then this is called a warm front.
If the cold air has the upperhand, then it is a __________ front.
Notes from Presentation
Air pressure is the weight of the ______________ pushing down on the earth.
Air pressure is not the ______________ all over the world.
The three things that make air pressure vary (be different) all over the world are:
1. _____________________________
2. ____________________________
3. _____________________________
The higher the altitude, the _______________ the pressure.
The lower the altitude, the _____________ the pressure.
Why is this true?
Why do your ears pop as you drive up to the mountains (higher altitude)? Why is it harder to
breathe at the top of a mountain?
This causes your ears to pop in order to _______________ the pressure between the outside and
inside of your ear. Since you are breathing ____________ molecules of oxygen, you need to breathe
___________ to bring the few molecules there are into your lungs to make up for the deficit.
 As the temperature goes _____________, the air pressure goes ____________________.
(hot molecules are further apart- less pressure).
As the temperature goes _______________, the air pressure goes __________________.
(cold air is more dense than warm air).
Demonstration Notes:
Sketch the demo.
What happens when the balloon is placed on the bottle in cold water?
What happens when the balloon is placed on the bottle in hot water?
 Humidity is the amount of moisture in the air.
Water vapor weighs less than __________ molecules.
As the air becomes more ________, the air pressure goes down (moist air weighs less than
dry air).
Drier air has __________ pressure because dry air weighs more than moist air, therefore it
has greater _____________.
Air Mass
 Air Mass is an extremely _____________ body of air whose temperature and moisture content
(humidity), at any given altitude (height), are fairly similar in any horizontal direction.
can cover hundreds of thousands of square miles.
there can be small _______________