Science - Biology
Standard 2 Objective 2
1 class periods of 70 minutes each
In this activity students will analyze the calorie content of several foods
Plants store the suns' energy as they combine carbon dioxide and hydrogen from water into sugar. The bonds formed contain energy that can be released by burning or respiration. The can used in this activity is a very primitive calorimeter. Accurate calorimeters are air tight with a measured amount of oxygen allowed in. These calorimeters are insulated to prevent heat loss but the principle is the same. The foods are burned and heat water. The highest temperature reached is recorded. Calories are measured and defined as the amount of energy needed to raise the temperature of one gram of water by one degree. To find calories you multiply the amount of water times the number of degrees the temperature rose. Most measurements of calories are actually kilocalories and are labeled with a capital "C" as opposed to a lower case "c". Releasing the energy in food can be compared to burning wood in a fireplace. See if students can describe similarities and differences.
1. Students perform experiment and record data 4 pts
2. Students analyze data correctly ..4 pts
Lesson Design by Jordan School District Teachers and Staff.