Water in The Atmosphere

Water Cycle

Water vapor enters the atmosphere by evaporation from the ocean and other bodies of water

    Molecules of liquid water escape until air after becoming water vapor

       living things can add to water vapor

Water vapor leaves by condensation

   water vapor becomes liquid water

       forms clouds

starts over again

Relative Humidity - %

The percentage of water vapor actually in the air compared to the maximum amount of water vapor air can hold (at a particular temperature)

measuring

    the instrument used is a psychrometer

        has two thermometers

            wet bulb thermometer and dry bulb thermometer