The Pharaoh has asked your help to design a better tomb. Seems he's concerned about the Sun's heat having less than positive effects on his body before he journeys to that land beyond the Sun. You have decided to see if insulation, materials that restrict the flow of heat, will help keep the tomb cool. But the Pharaoh is stingy. Before any changes are made to the tomb, he wants to be certain that he's not wasting his precious gold to buy insulation that's not needed.

6 Styrofoam cups and 3 lids 3 thermometers water hot plate 1000 ml beaker BE CAREFUL! THIS INVESTIGATION REQUIRES THE USE OF HOT WATER.

1. Using a hot plate or other device, heat 500 ml of water to 50 degrees C. 2. While the water is heating, make a hole in the cup lids so that you can put a thermometer in the cup and still read it without removing it from the water. (Why is this important?) 3. Place one cup inside another cup so you have a double insulated cup (Cup 2). Repeat the process and construct a triple insulated cup (Cup 3). Cup one is just that--one cup! 4. Carefully measure and add 150 ml of the HOT water to each set-up. Put the lids on the cups and carefully slide the thermometers into the hot water. 5. Wait one minute, then record the temperature in each set of cups. Record the data in your laboratory notebook. You might want to use a table. 6. Continue recording data every five minutes for 20 minutes or until the water temperature is about equal to air temperature. 7. Calculate and record the change in temperature for each set-up.