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unit 9
| Question | Answer |
|---|---|
| air mass | a large region of the atmosphere in which the air has simular properties |
| climate | the average weather pattern of a region |
| weather | the condition of the trosphere at a particular place and time |
| derechos | windspread windstorm that causes damages to houses, cars, trees |
| tornadoes | a rotating funnel shaaped cloud with wind speeds up to 500 km/h |
| tropical storm | storm that grows over warm areas and develops into a circular storm, winds less than 74mph |