Marathon Snack Alternate Assignment. Key Terms

Transcription

1 Lesson 3.4 Marathon Snack Alternate Assignment Name Date Period calorie calorimetry Key Terms Engage Imagine that you are in a long race. Your body is rapidly depleting its energy reserves. You need energy. You grab a snack. 1. Thinking back to Unit 2, what kinds of macromolecules would you want to have in the snack? 2. Why would you want these macromolecules in the food? 3. What kinds of macromolecules do you think are easiest for the body to break down and release stored energy? 4. Ms. Menna is running a marathon tomorrow and you volunteered to cook her dinner. What should you make her? Why? Explore Use the Internet to research the following questions. Since you have a week to complete the assignment, the research can be done at the library if you do not have easy access to Internet at home. 5) How many calories are there in one gram of: a) Carbohydrates b) Lipids c) Proteins 6) Why is there a difference in the number of calories in each of the macromolecules in question #5? 7) a) What is difference between unsaturated and saturated fats? b) Give an example of each. c) Which is healthier? Why? 8) What is fiber? 9) Why is fiber good for you?

2 10) a) What is refined sugar? b) Is natural or refined sugar better for you? Why? 10) What is calorimetry? 11) a) What is a calorimeter? b) Look up the word CocaCalorimeter at Copy the first question in the description to the right of the picture. c) Describe the steps that the description states you can use to find out the answer to the question about which has more calories. d) Draw and label the example of the calorimeter shown at this web site.

3 In this activity your classmates experimentally measured the energy stored in the chemical bonds of several foods by burning the foods and measuring the amount of energy gained by a sample of water heated by the burning food. They used a calorimeter to determine the amount of Calories in each food sample. When you look at nutrition labels, you see the amount of Calories in an amount of food. 1 Calorie = 1 kilocalorie = 1,000 calories The capital C is used to distinguish this amount as a kilocalorie The Calories in this food sample is = to 60,000 calories You will be given hypothetical data for three types of food. Below are the nutrition labels for each type. Use the labels and then calculate the experimental data for each type of food tested to complete the charts below. 1. Name the first food on your list to Name of food: Peanut Butter the label (food Calories on labels are actually kcals) (): 3.00g 3.40g 3.20g Initial temperature ( C): 21 o C 22 o C 21 o C Final temperature ( C): 30 o C 32 o C 39 o C 13. Record the final mass of the burned sample. Final mass (g): 2.80 g 3.15 g 2.50 g gram from to ()

4 1. Name the next food on your list to Name of food: Oats & Honey Cereal the store label. (): 2.10 g 3.50 g 3.00g Initial temperature ( C): 21 o C 22 o C 21 o C Final temperature ( C): 29 o C 27 o C 34 o C 13. Record the final mass of the burned sample. Final mass (g): 1.95 g 3.30 g 2.30 g gram from to () 1. Name the final food on your list to Name of food: Raisins the store label. (): 1.50 g 1.70 g 1.78 g Initial temperature ( C): 22 o C 21 o C 21 o C Final temperature ( C): 30 o C 30 o C 32 o C 13. Record the final mass of the burned sample. Final mass (g): 1.10 g 1.25 g 1.40 g gram from to ()

5 Explain 1. Which of the marathon snacks foods was most energy rich? How do you know this? 2. Which of the marathon snacks food was the least energy rich? How do you know this? 3. How does the matter in the food become usable energy for a marathon run? (In other words, what process occurs?) 4. Look at the food labels from your items and record the macromolecules present (and relative amounts) for each of your three items in your snack (if you don t have the label here in class, you can do a Google search for the product to view the nutrition label). Food Item Grams per serving Lipids/Fats? If yes, how many grams per serving? Proteins? If yes, how many grams per serving? Simple Carbohydrates? (Listed as Sugars on labels) If yes, how many grams per serving? Complex Carbohydrates? If yes, determine the amount of grams: Total carbohydrate grams sugar grams 5.Compare the advertised energy values on the commercial labels to the experimental values calculated from your observations (the values in Box 4 and 20 for each food). Calculate the error for each food your group tested. If you get a negative value, be sure to keep negative sign to show that the experimental value is lower than advertised/accepted. Food Item Advertised/accepted energy value (Box 4) Experimental energy value (Box20) () Error = Exp. Value Accepted Value 6. Google Calorimeter Mulanto (the video with the URL below should be the first option). The type of calorimeter in the video is much more similar to what big companies use when they measure Calories in their food. What do you think could account for the differences between the advertised values and your classmates data? The experimental data came from a calorimeter similar to the one you drew in Question 11d.