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Science (Factors of Weather (Humidity, Rainfall, Wind Speed, Air Masses /…

- - - - Air Mass - Large body of air with similar temperature and humidity characteristics.
      - Depends if it is over
        land or water,
        AND where it is
        coming from.
      - Caused by unequal heating of the Earth and location over water or a continent.
      - Movement of air masses creates weather.
    - - Cold Air Front
        
        Occurs when a cold air mass replaces a warm air mass.
        Warm air is pushed up because it is less dense.
        
        Moves quickly and temperatures drop rapidly.
        May result in thunderstorms, severe weather or snow.
      - Warm Front
        
        Occurs when a warm humid air mass replaces a cold dry air mass.
        It rises slowly over the cold air mass.
        
        Brings warmer temperatures and higher humidity.
        May result in light rain showers or snow.
      - Occluded Front
        
        Occurs when a warm air mass is caught between two cooler air masses.
        
        Brings sudden heavy downpours {rain}.
      - Stationary Front
        
        Occurs when warm and cold fronts stop when they meet because neither is strong enough to overtake the other.
        
        The weather is often cloudy,
        The temperatures and wind may be different on either side of the front.