1. Food Energy Lab Heading: Name, Partner, Date, Period, Nutrition Science

2. Introduction When we eat food our bodies burn the food to use the energy that is released when they are broken down. Does each piece of food contain the same amount of energy? WRITE YOUR OWN INTRODUCTION INCLUDE THE DEFINITION OF A CALORIE

3. Purpose: To determine the amount of energy contained in specific foods. To determine if each piece of food contains the same amount of energy. To determine the accuracy of a calorimeter in measuring kcals.

4. Materials Frosted cheerio Mini marshmallows Cheese cracker Forceps Electronic balance Needle and cork Ceramic square Graduated cylinder Ring stand Clamps Tap water Thermometer Test tube Test tube rack Test tube holder Lighter Calorimeter Lab Quest/Vernier probe Tin can

5. Procedure 1.gather 3 pieces of each item 2.weigh each one individually write it down 3.make your observations-before 4.put the item on the needle and cork or use forceps with the cheese cracker 5.measure out 10ml of water and pour it into your test tube 6.take the temperature of the water 7.hold the test tube over the food 8.light the food and make observations 9.take the temperature when the food is done burning. CalorimeterOpen Air Burn

6. Data Table #1 Qualitative Observations Before burning During burning After burning Cracker Cheerio Marshmallow Extra Credit

7. Data Table #2 experimental data FoodTrial #WeightT1T1 T2T2 ΔTΔT Cheerio1 2 3

8. Data Table #3 - Averages #1 Averag e ΔT #2 Average weight Volume of water used #3 calories ΔT x V #4 calories /gram #5 Kcal/g (data) #6 Kcal/g (label) Cheerio Calor- imeter Cheerio Open air Cheez-it Calor- imeter Cheez-it Open air Marsh- mallow Calor- imeter Marsh mallow Open air

9. #1. calculate the average change in temperature of each food. #1 Average ΔT #2 Average weight Volume of water used #3 calories ΔT x V #4 calories /gram #5 Kcal/g (data) #6 Kcal/g (label) Cheerio Marsh mallow Cheez- it

10. #2. calculate the average weight for each food #1 Average ΔT #2 Average weight Volume of water used #3 calories ΔT x V #4 calories /gram #5 Kcal/g (data) #6 Kcal/g (label) Cheerio Marsh mallow Cheez- it

11. Record the volume of water used #1 Average ΔT #2 Average weight Volume of water used #3 calories ΔT x V #4 calories /gram #5 Kcal/g (data) #6 Kcal/g (label) Cheerio Marsh mallow Cheez- it

12. #3. calculate ΔTxV=calories, using the average temperature change (#1) #1 Average ΔT #2 Average weight Volume of water used #3 calories ΔT x V #4 calories /gram #5 Kcal/g (data) #6 Kcal/g (label) Cheerio Marsh mallow Cheez- it

13. #4. calculate the amount of calories in 1 gram using the formula #1 Average ΔT #2 Average weight Volume of water used #3 calories ΔT x V #4 calories /gram #5 Kcal/g (data) #6 Kcal/g (label) Cheerio Marsh mallow Cheez- it #calories = x = calories/g # grams 1 gram #2 #3

14. #5. Convert answers in column #4 from calories to Calories (kcals) #1 Average ΔT #2 Average weight Volume of water used #3 calories ΔT x V #4 calories/ gram #5 Kcal/g (data) #6 Kcal/g (label) Cheerio Marsh mallow Cheez- it calories/1,000 = kcals

15. #6. compare “actual” or nutritional label info to “experimental” (#5) #1 Average ΔT #2 Average weight Volume of water used #3 calories ΔT x V #4 calories/ gram #5 Kcal/g (data) #6 Kcal/g (label) Cheerio Marsh mallow Cheez- it Food label Kcals/serving = x grams/serving 1g

18. 30 grams

19. Analysis in notebook Answer the questions on the back of your lab in either complete sentences or question and answer format.

20. Conclusion in notebook Answer the conclusion using information from your notes, class discussion and lab. Discuss calorimeter results as compared to standards and cork & pin

21. Links - Calorimeter Bill Nye – Nutrition, episode 62 http://www.gamequarium.org/cgi- bin/search/linfo.cgi?id=8448http://www.gamequarium.org/cgi- bin/search/linfo.cgi?id=8448 Calorimeter experiment – http://www.youtube.com/watch?v=Ip8Npp mm11khttp://www.youtube.com/watch?v=Ip8Npp mm11k Bomb Calorimeter http://www.youtube.com/watch?v=ohyA9a mFfsc&feature=relatedhttp://www.youtube.com/watch?v=ohyA9a mFfsc&feature=related