BACKGROUND INFORMATION: (Something About Protein, Carbohydrate, and Lipids Here. Use Your

Name: ______Per. ______

CALORIE LAB

BACKGROUND INFORMATION: (Something about protein, carbohydrate, and lipids here. Use your notes) ______

Food Sample Composition

1. Cashew 160 c/28 g 10 g fat 15 g carb 2 g protein

2. Marshmallow 100 c/34 g 0 g fat 24 g carb <1 g protein

3. Goldfish cracker 140 c/30 g 5 g fat 20 g carb 4 g protein

4. Cheeto 170 c/28 g 14 g fat 8 g carb 5 g protein

Calorie: Calorie is a unit of measurement for energy. One calorie is defined as the amount of energy required to raise one cubic centimeter of water by one degree Centigrade. For purpose of measuring the amount of energy in food, nutritionists most commonly use kilocalories (C) (= 1000 calories).

QUESTION : Which type of food, made up of mostly one of the four main categories of macromolecules, supplies the most energy per gram?

HYPOTHESIS: If I burn a cashew, a marshmallow, a goldfish cracker, and a cheeto, I think that that #1 listed below will give off the most energy, #2 the second most, #3 the third most, and #4 the least, because ______

MATERIALS: (you fill these in) PROCEDURE 1. From your teacher obtain: 1 cheeto, 1 cashew, 1 goldfish cracker, and 1 marshmallow. 2. Weigh each item and record the mass in the table. 3. Fill a beaker with 40 mL of cold water. Pour the water into the soda can. Place the can on the wire mesh and place a thermometer inside the can. 4. Take the temperature of the water (starting temperature). 5. Start with the marshmallow. Put it onto the wire. Position it directly underneath the can. The cork will act as a base. 6. Carefully light a match and hold it to the marshmallow until the marshmallow is fully lit. When the marshmallow burns out, take the temperature again. (end temperature). 7. Subtract start temp from end temp to get the change in temp. Divide that number by the mass of the marshmallow to get the energy per gram of the marshmallow. 8. Pour the water out of the can into the sink. 9. Repeat with all four food items.

DATA: Amount of energy per gram given off by four different types of foods.

Food Sample Mass Start Temp End Temp Δ Temp Δ Temp/Gram

Graph: I’m letting you off the hook on this one. No graph necessary.

Conclusion: Write a paragraph comparing your results with your prediction. List the food in order of calories from high to low. How does it compare with the actual calorie values?