Weather Elements of weather Weather The state of

Weather Elements of weather

Weather The state of the atmosphere at a specific time and place

Elements of weather Temperature Measure of how quickly air molecules are moving Molecules move more quickly in warm air than in cool air

Elements of weather Temperature Measured with a thermometer Units in Fahrenheit, Celsius, or Kelvin

Elements of weather Air Pressure The force exerted by the atmosphere at a given location

Elements of weather Air Pressure Measured with a barometer Units in inches of mercury (in. Hg) or millibars (mb)

Elements of weather Air Pressure High Pressure Occurs when denser air masses sink from higher up in the atmosphere Usually cooler air

Elements of weather Air Pressure Low pressure Occurs when thinner air masses rise up into the atmosphere Usually warmer air

Elements of weather Wind Movement of air from a high pressure area to a low pressure area

Elements of weather Wind Measured by direction Wind vane or wind sock Or speed Anemometer

Elements of weather Humidity The amount of water vapor in the air Saturation is when there is enough water vapor to form droplets or to condensate

Elements of weather Relative Humidity The amount of water vapor in the air compared to how much it needs to be saturated

Elements of weather Dew Point The temperature at which saturation is reached and condensation occurs.