| A | B |
|---|
| meteorologist | scientist who studies weather |
| front | border where two air masses meet |
| barometer | instrument measuring air pressure |
| atmosphere | layer of air surrounding the planet |
| humidity | amount of water vapor in the air |
| warm front | brings heavy rain or snow, temperature rises |
| stationary front | front that does not move |
| wind | air in motion |
| anemometer | instrument measuring wind speed |
| air mass | huge body of air |
| air pressure | all particles of air pressing down on a surface |
| stratosphere | contains most of our ozone |
| thermosphere | hot outermost layer of air |
| greenhouse effect | atmosphere traps heat near surface |
| mesosphere | coldest layer of atmosphere |
| cold front | thunderstorms occur here |
| troposphere | all weather occurs in this layer |
