Introduction Water is a universal substance. It has properties that are characteristic of most solids, liquids, and gases, and properties that are unique to itself. Materials small pot, stove, ice, water, thermometer (with a temperature range of at least -20 degrees Celsius to 120 degrees Celsius), metal mesh screen Procedure 1. Place about a half cup of water in a small pot (preferably about a 1 cup pot). Fill the pot the rest of the way with ice, until the water is at the top--the ice will actually be oating slightly above the rim ofthe pot. 2. Place the thermometer in the water, and turn on the burner. Stir the pot as the ice melts, and make observations of what happens. 3. Continue making observations after the ice melts. Record the temperature every ten seconds. Be careful not to let the end of the thermometer rest on the bottom of the pot. Note any changes in your log. 4. After the water starts to bubble and steam and is clearly rising from the pot, carefully take the thermometer from the water and let it cool down. Hold it in the steam and read the temperature once it stabilizes. 5. After you've recorded the temperature, place the mesh screen between the thermometer and the steam. Record the change, if any