Discover the calorie content of foods by observing how much heat they produce in water. If you have a calculator-based laboratory (CBL™) insturment for collecting data, then this laboratory worksheet will not need any changes. If not, your class can perform the same experiment by recording temperatures by hand. In this case, rewrite the worksheet. You may also need to look up how to make a simple metal can calorimeter so that you can walk aspiring scientists through the setup.