Chemistry of Silicon Chips Essay

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Energy Content of Foods
(using the Scientific Method)
Lab Objective
This laboratory experiment will allow the student to systematically investigate a real
world problem involving the energy content of foods. The student will apply the scientific
method in defining the problem, proposing a hypothesis, using the literature to gain
background information pertinent to the problem, designing an experimental approach to test
the hypothesis (drawing upon techniques learned in previous experiments), analyzing the data,
developing conclusions from the data, and examining limitations to the experimental approach
which was used.
I. The Problem
Consider the following questions and state the problem which you will investigate.
Do all foods provide the same amount of energy?
Can foods be used as fuel?
Are the Calories on a food label the same as the calories in chemistry class?
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II.
Hypothesis
Propose an answer to your problem/question.
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III.
Background Research
Using the literature provided, find answers to the following questions:
A.
Why is the energy value in foods important?
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B. What does “Calories” on a food label tell a consumer?
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C. Describe two methods for determining the energy value of foods.
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D. What is the source of the energy released by foods?
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E. How are metabolic reactions (particularly respiration) and combustion reactions similar
and how are these reactions different?
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F. Why do some things which we eat have no caloric value (eg. water, artificial
sweeteners)?
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