Follow the trail water takes through its three stages: evaporation, condensation, and precipitation.
Students will realize that water is everywhere. It is always moving from the earth's surface into the air and back to the surface again. This constant movement and changing of water is called the water cycle.
Students will know that about seventy percent of the earth is covered with water. Almost all of that water is salty water...
Lead a brief discussion by asking a few questions. Where does the water that makes up raindrops come from? How does the water get into the air? Has the water in the oceans always been there? See what ideas your students have.