An Earth science class left pan of water outside in the open air to measure the rate of evaporation. For water to be lost by evaporation, the air temperature must be above
(1) the dew point of the atmosphere
(2) the freezing point of water
(3) the boiling temperature of water
(4) the average annual temperature
(1) the dew point of the atmosphere
(2) the freezing point of water
(3) the boiling temperature of water
(4) the average annual temperature