The water cycle includes the processes of evaporation, condensation and precipitation
11.A.1a: Describe an observed event.
12.C.2b Describe an explain the properties of solids, liquids and
12.E.2a. Identify and explain natural cycles of the Earth’s
land, water and atmospheric systems.
Use caution when dealing with water.
Science Process Skills:
Observing and Communication
Cups of water
Wax paper squares
Divide class into groups of 2 or 3.
Distribute water, eyedroppers and wax paper.
Have students drop little drops of water onto the wax paper. Have them
drop some near other drops and others farther apart.
Explanation: Water acts the way it does because the water molecules have a very strong attraction to each other. We
call this attraction - cohesion. The strong cohesion of water molecules
means that they would rather be with each other than apart. This results in a very strong pull on the water molecules that
are in the air. The accumulation and attraction of the water in the atmosphere causes raindrops to form. These water droplets collect and then form clouds. As clouds move, the water droplets bump into each other
and form larger droplets of water. When the air becomes too heavy with water
droplets, the clouds get heavy and gravity pushes the water back to earth and the in the form of precipitation. Precipitation can be in the form of: Rain, Hail, Freezing
Rain, Sleet or Snow.