The students investigated how many how metal objects it would take to change the temperature of a cup of water. The students worked in their cooperative teams to make a prediction and set up a fair test investigation by measuring the temperature of the water before and after placing hot metals objects into the cup. The students evaluated the investigation by concluding whether the hot metal pieces are heat producers or heated by something else. To conduct this investigating the students will need a thermometer, tongs to pick up the hot bolts, a timer, a polystyrene cup and several hot bolts from a hardware store. The bolts need to be placed in the sun to heat up prior to the lesson.