This lesson will require approximately fifteen minutes to set up. Provide ten minutes for each daily observation and recording. Creating the pamphlet may take one to two hours. Writing the letter to a farmer may take thirty to forty five minutes.
Heat makes water evaporate more quickly since water molecules move faster when they are warm.
Since the molecules are moving faster, more of them can leave the surface of the water at one time. Warm air can hold more water vapor than cool air. This is because there is more space in the air for water molecules. Wind also helps water evaporate more quickly. It blows away moist air at the interface of water surface and air making room for more water molecules.