| A | B |
| weather | the condition of Earth’s atmosphere at any time |
| meteorology | the study of Earth’s weather |
| meteorologist | a person who studies the causes and effects of Earth’s weather |
| severe weather | conditions called storms that occur when pressure differences cause rapid air movement |
| hurricane | a low pressure tropical storm that forms over warm ocean water |
| Thermometer | measures air temperature |
| Hygrometer | measures the amount of water vapor in the air |
| Barometer | measures air pressure |
| Anemometer | measures wind speed |
| Wind Vane | measures wind direction |
| Rain Gauge | measures precipitation |
| troposphere | the layer of the atmosphere found closest to the |
| atmosphere | Nitrogen and Oxygen |
| air pressure | the force exerted by the gases pushing on an object |