| A | B |
|---|
| convection currents | rise & sink in a circular pattern |
| jet stream | band of very high, fast wind |
| air mass | large body of air all alike |
| front | boundary between two air masses |
| hurricane energy | warm ocean water |
| clear skies | caused by high pressure & no fronts nearby |
| barometer | measures air pressure |
| anemometer | measures wind speed |
| climate | average weather over long period of time |
| weather | conditions at a specific time |
| air pressure decreases as | altitude increases |
| weather conditions | troposphere |
| cool air | sinks |
| warm air | rises |
| winds and fronts move | west to east |
| 3 liters of air | lungs hold |
| 80% of air | nitrogen |
| 20% of air | oxygen |
| lightening | electric spark that causes thunder |
| spinning column of up & down winds | funnel cloud |
| observe, infer, predict | forecasters |
| different in air temperature | causes wind |
| Continental Tropical Air Mass | warm and moist over land |
| Continental Polar Air Mass | cold and dry over land |
| Maritime Tropical Air Mass | warm and moist over water |
| Maritime Polar Air Mass | cold and dry over water |
| Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere | 5 layers of Earth's atmosphere |
| blizzards, thunderstorms, tornadoes, hurricanes | 4 kinds of severe weather |
| barometer | measures air pressure |
| anemometer | measures wind speed |
| rain gauge | measures amount of fallen rain |
| hygrometer | measures moisture in the air |
| radar | measures wind & precipitation in a storm |
| air temp.- pressure, & moisture, clouds, precipitation, wind speed & direction, | parts of a weather system |
