3. Water is made up of molecules. Water changes state (gas, liquid, solid) when it’s molecules are heated or cooled.

4. Add Cold Add Heat Water molecules become dense when in cold temperatures. This is seen when water turns to ice or changes from a gas to liquid. Water molecules become less dense when heat is added. This happens when water changes from ice to liquid or from liquid to gas.

5. Turn and Talk. Draw what you think the molecules look like at each stage of the water cycle.

6.  How does the sun affect the water cycle?