On some mornings grass and leaves may be very damp even though it hasn't rained during the night. Procedure Half fill the can with ice and set it aside for 10 minutes. Once you have examined the moisture that has condensed on the outside of the can, add a couple of teaspoons of salt. Gently swirl the contents of the can a few times and put it down. Set the can aside for 10 minutes.
Questions Answer the following questions in the spaces provided.
The ice cools the can and the air in contact with it. As the air cools, water from the air condenses as dew. Now rather than dew forming, crystals of ice, known as frost, form. Tiny droplets of dew often form at night on cold surfaces such as grass and leaves. In deserts, dew may be the only form of moisture available to plants and animals.