Biology

Food and Energy

Lesson Plan

State Standards:

Recognize that producers (plants that contain chlorophyll) use the energy from sunlight to make sugars from carbon dioxide and water through a process called photosynthesis. This food can be used immediately, stored for later used, or used by other organism.

Essential Question:

Lesson Questions:

  1. What kind of food gives you energy?
  2. How will students confirm that energy in food can be measured in kilocalories?
  3. What do you do when you are out of energy?

Introduction:

According to BPS 8th grade Science Curriculum students will learn food is produced by photosynthetic organisms, food contain energy from the Sun that drives life processes, and that energy moves from one trophic level to another through feeding relationships.

Finding the Energy is designed to engage (empower) students to think independently about making healthy choices about the food they eat.

Task:

Lesson Experiences:

Water-Heating setup

  1. Assemble this apparatus for measuring the energy in a cheese ball. (See apparatus set up Getting Ready for Part 1 p.143).
  2. Form an aluminum cup by carefully cutting and molding the aluminum-foil square around a vial.
  3. Squeeze the ring a bit and insert the downward tines into the binder clip. Slide the ring down over the dowel.
  4. Open the clip and clamp it all the way onto the dowel about 10 cm above the base.
  5. Spread the top of the aluminum-foil cup to make a flange. Drop the cup into the holder.
  6. Slide the cheese ball on its holder under the cup. Move the clip up or down a bit until the distance between the cheese ball and the bottom of the cup is about 1.5 –2 cm.
    (After water apparatus has been set up)
  7. Check for safety and wear safety goggles.
  8. Use a graduated cylinder to place 20 ml of water in the cup and measure the temperature.
  9. Burn the cheese ball and measure the temperature of water again.
  10. Repeat twice steps 7-8. Take the average temperature.
  11. Clean –up your workstations.

Conclusion:

Finding the Energy is an excellent resource for adolescents to begin to think about building a healthy lifestyle. Part Two: Students inquire into where food energy comes from. They learn that photosynthesis is the process that produces new energy-rich biomass called food. The investigation emphasizes that building materials comes from food. Humans eat food to get the atoms and molecules they need to make body tissues. Part Three: Using Energy; Students think of the ways organisms use energy to do work and make things happen. Part Four: Students learn a convention, trophic levels, for describing the movement of food energy from organism in a food web. Some of the social issues that can be discussed are anorexia, obesity and starvation.

Assessments:

Measuring Fod Energy: (Evaluation)

Score

If the student …

Total Score

4

adequately fills in the data chart, determines the temperature change, calculates the number of calories the food piece produced when it burned and give an explanation on the way the body obtain energy from food without errors.

3

adequately fills in the data chart, determines the temperature change, calculates the number of calories the food piece produced when it burned, and give an explanation on the way the body obtain energy from food with one error.

2

inadequately fills in the data chart, determines the temperature change, calculates the number of calories the food piece produced when it burned and give an explanation on the way the body obtain energy from food.

1

inadequately fills in the data chart, determines the temperature change, calculates the number of calories the food piece produced when it burned and do not give an explanation on the way the body obtain energy from food.

0

is unable to complete the assignment as described above.

 

Resources:

Materials (For Each Group)

Items
Quantity
Dowel stand
1
Aluminum foil square (heavy duty)
1 (15 cm X 15 cm)
Binder clip medium
1
Vial with cap
1
Thermometer
1
Cardboard square
1 (7 cm X 7 cm)
Graduated cylinder
1 (25-50 ml)
Match striker *
1
Safety matches *

Cheese balls*
2
Cheese- Ball Nutrition Label
1
Safety goggles
3
Water
20 ml
Scissors
1
Populations and Ecosystems. Lab Notebook
1
Supplied by Teacher  

FOSS Teacher Guide Populations and Ecosystems, Lawrence Hall of Science, 2004 The Regents of the University of California

Remember Scientists: Support your answers with…CER!!! (Claim, Evidence, Reasoning)

Extention:

Image Credit: Food Pyramid