| A | B |
|---|
| How much space an object takes up | volume |
| with increase pressure there is | decreased volume |
| air pressure | the force put on a given area by the weight of air above it |
| air pressure depends on | temperature |
| when air is heated the gases | speed up and spread out into a larger space |
| If air pressure decreases then air | weighs less |
| atmospheric pressure decreases with | higher altitude |
| altitude | the height above Earth's surface |
| altitude is measured from | sea level |
| as the volume of a container of air increases the air pressure | decreases |
| as the temperature increases, | the air pressure decreases |
| As humidity increases | the air pressure decreases |
| Humidity | the amount of water vapor in the air |
| water vapor weighs | less than most of other gases |
| when water vapor added to air | the mixture of gases becomes lighter and so exerts less pressure than dry air |
| global winds blows over long distances | in predictable directions |
| global winds blow because | sunlight heats areas near Earth's euator more than it heats Earth's poles |
| Coriolis Effect | change in direction of something on or above Earth's surface because of Earth's rotation |
| cold air | more dense or packed with particules than warm air |
| Cold air will | sink |
| warm air will | rise |
| a warm volume of air is less | dense and will rise |
| Areas of high and low pressure | differential heating of Earth's surface |
| Front | a boundary that separates air masses with different moisture content and temperature |
| Higher relative humidity | the more water vapor in air |
| air moving from areas of high pressure to low pressure cause | winds |
| cloud in bottle | water vapor condenses around smoke particles |
| dew point | when water changes from gas to a liquid |
