Cell Energy Cycle
Vocabulary: aerobic respiration, anaerobic respiration, ATP, cellular respiration, chlorophyll, chloroplast,
cytoplasm, glucose, glycolysis, mitochondria, photosynthesis
Prior Knowledge Questions
1. What does a plant need to survive and grow?
__________ and _____________
2. What does an animal need to survive and grow? __________ and _____________
Gizmo Warm-up
3. What is the chemical formula of Oxygen?
_______
4. What is the chemical formula of glucose? _______________
5. What is the chemical formula of carbon dioxide? ______
6. What is the chemical formula of water? _______
Activity A: Photosynthesis
Click Reset. Check that the PHOTOSYNTHESIS tab is selected.
Question: What are the reactants and products of photosynthesis?
7. Where does photosynthesis occur? ________________________________
8. Drag each molecule from the CHEMICALS box to the chloroplast in the PHOTOSYNTHESIS box.
If a molecule is a reactant, it will stay in the chloroplast.
Which molecules are reactants in photosynthesis?
_____________ and ___________
9. Click Add light and look at the Output box.
What are the products of photosynthesis?
______________ and ______________
10. A chemical equation shows reactants on the left side of an arrow, and products on the right, like this:
reactant + reactant  product + product
Using your answers from 9 and 10, what is the chemical equation for photosynthesis?
__________ + _________  _________ + ___________
(Turn on Show formula of chemical equation to check)
11. How would this formula be written in words? Rewrite the sentence below
_____________ and ___________ plus _________ produces _____________ and _____________.
(Turn on Show Description of Chemical Equation to check)
Activity B: Cellular respiration
Click Reset. Select the RESPIRATION tab
Question: What are the reactants and products of cellular respiration?
12. Drag each molecule from the CHEMICALS box to the RESPIRATION box.
Which molecules are reactants in cellular respiration? ____________ and ____________
13. Click Next. What happens in the cytoplasm (blue area)? Rewrite the sentences below.
GLYCOLYSIS:
_______________ turns into _______________. __________ is released as ATP.
The output includes __________ as a product.
14. Click Next TWICE. What happens in the mitochondria (green area)? Rewrite the sentences below.
AEROBIC:
RESPIRATION
____________ enters the mitochondria. A large amount of _________ is released as ATP.
The output incudes
_________ and _________ as products
15. A chemical equation shows reactants on the left side of an arrow, and products on the right, like this:
reactant + reactant  product + product
Using your answers from 12 and 14, what is the chemical equation for photosynthesis?
__________ + _________  _________ + ___________
(Turn on Show Formula of Chemical Equation to check)
16. How would this formula be written in words? Rewrite the sentences below.
_____________ and ___________ react to produce _____________ and _____________ and release a
large amount of ____________ in the form of ATP.
(Turn on Show Description of Chemical Equation to check)
Activity C: The carbon-oxygen cycle
Click Reset. Select the CYCLE tab.
Question: How is photosynthesis related to cellular respiration?
Drag the Oxygen, Glucose, Carbon dioxide, and Water into the CYCLE pane.
17. Which substances are reactants in photosynthesis?
____________ ____________
18. Which substances are products of photosynthesis?
____________ ____________
19. Which substances are reactants in respiration?
____________ ____________
20. Which substances are products of respiration?
____________ ____________
21-25 Draw the picture of the Photosynthesis and Cell Respiration Cycle.