| A | B |
|---|
| weather | the state of the atmosphere at a specific time and place-air pressure, wind, temperature, moisture in the air |
| humidity | the amount of water vapor in the air |
| relative humidity | amount of water vapor present in the air compared to the amount needed for saturation at a specific temperature |
| dew point | the temperature at which air is saturated and condensation forms |
| fog | a stratus cloud that is formed when air is cooled to its dew point near the ground |
| precipitation | water falling from the clouds...cloud droplets combine and grow large enough to fall to earth |
| air mass | large body of air that has properties similar to the part of eath's surface over which it develops |
| front | a boundary between 2 air masses of different density, moisture, or temperature |
| tornado | a violently rotating column of air in contact with the ground |
| hurricane | a large swirling, low pressure system that forms over the atlantic ocean. The most powerful storm. |
| blizzard | a winter storm where winds are 56 km/h the temperature is low, the visibility is less than 400m in falling or blowing snow persisiting for 3 or more hours |
| meteorologist | a person who studies weather by taking measurements of temperature, air pressure, winds, humidity, and precipitation |
| station model | shows weather conditions at a specific location |
| isotherm | a line that connects points of equal temperature on a weather map |
| isobar | a line drawn to connect points of equal atmospheric pressure on a weather map |
