Cellular Respiration Molecular Name Model Activity - NJCTL
Cellular Respiration Molecular Model Activity
7th Grade PSI
Name ____________________________ Score______________/27 points
Warmup: 1. Write the chemical equation that represents cellular respiration.
2. Which part of the equation represents a. food? b. energy?
3. Name two examples of something that uses cellular respiration.
Objective: To model how food is rearranged through chemical reactions to form new molecules that support growth and/or release energy as this matter moves through an organism.
Materials:
6 carbon atoms (red gumdrops) 12 hydrogen atoms (green gumdrops) 18 oxygen atoms (yellow gumdrops) 30 toothpicks
Directions:
1. Use the atoms (gumdrops) and toothpicks to construct the reactants in cellular respiration. Make sure to construct the correct amount of each reactant molecule. If you need help forming specific molecules, refer to the Molecule Help Sheet.
2. Show your teacher your reactant molecules to make sure they are correct.
3. After your teacher has approved your model, draw them on your Cellular Respiration Molecular Model sheet in the correct locations. Be sure to indicate how many of each molecule there are.
7th Grade PSI
Matter and Energy in Everyday Life
4. Now dissemble the reactants. Using the same atoms, repeat steps 1-3 for the products of cellular respiration.
5. Write the following terms in the correct locations on your Cellular Respiration Molecular Model sheet:
Exothermic Reaction Glucose ATP/Energy Water Carbon Dioxide Oxygen Reactants Products 6. Answer the summary questions.
7th Grade PSI
Matter and Energy in Everyday Life
Cellular Respiration Molecular Model
7th Grade PSI
Matter and Energy in Everyday Life
Summary Questions: 1. Explain the purpose of cellular respiration.
2. What are the reactants needed for cellular respiration? Where do they come from?
3. What products result from cellular respiration?
4. Where does cellular respiration take place?
5. Recall how you disassembled the reactants in order to make the products. What part of cellular respiration does this represent?
6. Why is it an accurate model to "reuse" the atoms from your reactants to build the products of cellular respiration?
7th Grade PSI
Matter and Energy in Everyday Life
Molecule Help Sheet
Water
Carbon Dioxide
7th Grade PSI
Oxygen
Matter and Energy in Everyday Life
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