Term
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Definition
| a large body of air that has properties similar to the part of the earths surface where it developed |
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Term
| What causes atmospheric pressure to vary? |
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Definition
| Atmospheric pressure varies over the earths surface |
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Term
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Definition
| A boundary between two air masses of different density,moisture or temperature. |
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Term
| WHen does a cold front occur |
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Definition
| a cold front occurs when colder air advances toward warm air. |
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Term
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Definition
| cold air wedges underneath the warm air that rises and then it cools, water vapor condenses to form a cloud. |
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Term
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Definition
| a warm front happens when warm air goes over cooler air. |
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Term
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Definition
| an occluded front happens when cold air moves toward cool air with warm air in-between them |
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Term
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Definition
| a stationary front is when the cool air and the hot air dont move |
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Term
| when do thunderstorms occur? |
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Definition
| thunderstorms occur in warm, moist air masses and along fronts |
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Term
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Definition
| lightning is caused by when current flows between opposite charge and then lightning flashes |
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Term
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Definition
| a tornado is a violently rotating column of air in contact with the ground. |
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Term
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Definition
| In severe thunderstorms wind at different heights blow in different directions. This difference in wind speed and directions is called wind shear which creates an updraft creates a rotating column parallel to the ground. If the column forms a funnel cloud then comes in contact with the ground it is considered a tornado. |
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Term
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Definition
| a large swirling low pressure system that forms over the warm atlantic ocean |
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Term
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Definition
| a winter storm that if the winds are higher than 56km/h, the temperature is low, if the visibility is crumby, and if these conditions go on for more than three hours. |
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Term
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Definition
| a person who studies weather. |
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