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Food Energy Lab

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

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Food Energy Lab

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  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. 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 Materials

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

  6. Data Table #1 Qualitative Observations

  7. Data Table #2experimental data

  8. Data Table #3 - Averages

  9. #1. calculate the average change in temperature of each food.

  10. #2. calculate the average weight for each food

  11. Record the volume of water used

  12. #3. calculate ΔTxV=calories, using the average temperature change (#1)

  13. #4. calculate the amount of calories in 1 gram using the formula #3 #2 #calories = x = calories/g # grams 1 gram

  14. #5. Convert answers in column #4 from calories to Calories (kcals) calories/1,000 = kcals

  15. #6. compare “actual” or nutritional label info to “experimental” (#5) Food label Kcals/serving = x grams/serving 1g

  16. 30 grams

  17. Analysisin notebook • Answer the questions on the back of your lab in either complete sentences or question and answer format.

  18. 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

  19. Links - Calorimeter • Bill Nye – Nutrition, episode 62 • http://www.gamequarium.org/cgi-bin/search/linfo.cgi?id=8448 • Calorimeter experiment – • http://www.youtube.com/watch?v=Ip8Nppmm11k • Bomb Calorimeter • http://www.youtube.com/watch?v=ohyA9amFfsc&feature=related

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