| A | B |
|---|
| hail | a form of precipitation that can break windows and destroy crops |
| areas of low pressure | areas of less dense, warm air that can be forced upward |
| sleet | a type of precipitation that forms when raindrops pass through a layer of freezing air near Earth's surface |
| relative humidity | given a percentage indicating how much water vapor is in the air on a certain day |
| fog | stratus cloud that forms when air condenses near the ground |
| dew point | the temperature at which air is saturated and condensation forms |
| areas of high pressure | areas of descending air |
| cloud | forms when millions of water droplets become suspended in air and collect around small dust particles |
| snow | a type of precipitation that forms when the air temperature is below freezing and water vapor changes directly to a solid |
| tornado | violent, whirling wind associated with thunderstorms |
| isotherm | line connecting points of equal temperature |
| meteorologist | person who studies weather |
| isobar | line connecting points of equal atmospheric pressure |
| front | boundary formed between two colliding air masses |
| air mass | large body of air with the same properties as the surface over which it develops |
| weather | present state of the atmosphere |
| station model | weather information collected by meteorologists at specific locations |
| hurricane | severe storm that forms over tropical oceans |
| air pressure | great masses of air molecules pushing down from above |
| precipitation | includes rain, snow, sleet, and hail |
| saturated | air holding all the moisture it can at a particular temperature |
| nimbostratus cloud | type of cloud that brings long, steady rain |
