2 ice cubes Activity 4. Bring out the concept that a cycle is round. Then introduce the subject of the water cycle, which will be developed further, when an understanding of evaporation , condensation , and precipitation , are understood.
Evaporation Begin by asking questions about evaporation.
Allow students to give examples of evaporation and list them on paper or the board. Demonstrate evaporation with Activity 1. Tie equal lengths of string around equal pieces of sponge. Wet each piece of sponge with equal amounts of water. Attach the free end of the string to a coat hanger.