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Weather
Unit 5 (6th Grade)
| Term | Definition |
|---|---|
| Weather | The day to day state of the atmosphere in a specific place at a specific time. |
| Temperature | How hot or cold the atmosphere is |
| Precipitation | any form of water that falls from the sky (rain, snow, sleet, hail) |
| wind | the movement of air from high pressure to low pressure are |
| humidity | the amount of moisture in the air |
| air pressure | the force exerted by the weight of the air above |
| cloud cover | the amount and type of clouds in the sky |
| climate | the long term average of weather patterns in a particular area over an extended period (usually 30 years or more) |
| seasons | regular changes in weather conditions throughout the year |
| solar radiation | the average amount of sunlight reaching Earth's surface |
| tropical climate zone | warm, with high rainfall, little seasonal changes |
| arid climate zone | hot and dry with very little precipitation |
| temperate climate zone | moderate temperatures with distinct seasons |
| polar climate zone | cold, with ling winters and short summers |
| meteorologist | a person who studies weather patterns in order to give us information about the day to day weather |
| thermometer | measure the air temperature |
| hygrometer | measures humidity (water vapor in the air) |
| barometer | measures air pressure |
| anemometer | measures wind speed |
| wind vane | measures wind direction |
| Rain gauge | measures the amount of precipitation |
| Pressure systems | areas of different pressure cause changes in weather |
| high pressure systems | air sinks down slowly and circulates clockwise; dry clear weather |
| low pressure systems | air rises and cools; circulates counter clockwise; cloudy and rainy weather |
| cold front | blue triangle pattern; brings clouds and heavy rain |
| warm front | red half circle pattern; humid air and light rain, scattered clouds |
| stationary front | blue triangle and red circle pattern facing opposite directions; rain, snow, fog and clouds |
| occluded front | triangles and half circle pattern facing same direction; brings rain and snow |
| Dew Point | Temperature at which water droplets condense (helps form clouds) |
| prefix iso | separated |
| therm | heat |
| thunderstorm | powerful short lasting storm with strong winds, heavy rain, thunder, lightning, and sometimes hail |
| Tornado | a destructive spinning funnel of air that has very high wind speeds |
| Hurricane | a tropical low pressure system with very high speeds of wind; the center is called the eye |
| drought | a long period of time when there is very little or no rain |
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