Science/Strand III/Content Standard 2/High School/Benchmark 3
Benchmark Question: How is food use in organisms related
to food storage?
Focus Question: How much energy is stored in food
molecules for future use by organisms?
The teacher will give each
pair of students a simple calorimeter to measure the amount of heat energy
contained in a variety of nuts (i.e., pecans, peanuts, walnuts, etc.).
- Calories = [(* mass of
water heated ) x (change in temperature)] ÷ (change in mass of the
* 1 gram of water = 1 ml of water
Each pair of students will
compare the calculated calorie values for the different nut samples. They
should evaluate which type of nuts stores the most energy. As a class they
should discuss how the plant uses this nut energy and how other organisms
use the nut for energy.
Extension: Students can measure the calories
contained in other common food sources in the same way.