Download Cell Energy Cycle

Name: ______________________________________
Date: ________________________
Unit 6 Lesson 2 Mastery Assignment
Student Exploration: Cell Energy Cycle
Vocabulary: aerobic respiration, anaerobic respiration, ATP, cellular respiration, chemical
energy, chlorophyll, chloroplast, cytoplasm, glucose, glycolysis, mitochondria, photosynthesis,
radiant energy
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
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 (look at the screen, under the term “CHEMICALS”)
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? Chloroplast or mitochondria (circle one)
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 (yellow area)? Rewrite the sentences
below.
GLYCOLYSIS:
______________ turns into ______________.
______________ is released as ATP.
14. Click Next TWICE. What happens in the mitochondria (orange area)? Rewrite the
sentences below.
AEROBIC:
______________ enters the mitochondria. A large amount of ______________
is released as ATP.
RESPIRATION
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 respiration?
_____________ + _____________  _____________ + _____________ + energy! (ATP)
(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?
____________ and ____________
18. Which substances are products of photosynthesis?
____________ and ____________
19. Which substances are reactants in respiration
____________ and ____________
20. Which substances are products of respiration?
____________ and ____________
CONCLUSION AND EXTENSION:
1. On a sheet of paper, draw a picture of the Photosynthesis and Cell Respiration
Cycle from Activity C.
2. Compare: How are the reactants and products of photosynthesis and respiration
related to one another?
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3. Summarize: How are respiration and photosynthesis related to each other?
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4. Think and discuss: In what ways are plants and animals dependent on each other?
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EXTENSION:
5. Extend your thinking: When you think of the word “respiration,” you might think about
the process of breathing, which is actually called ventilation. (The respiratory system
consists of the windpipe, lungs, etc.)
How is breathing related to cellular respiration? (Hint: Think about both the reactants
and the products of cellular respiration.)
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6. On your own: If no oxygen is present, pyruvic acid breaks
down to form lactic acid. You can feel the effects of lactic acid
if you exercise very hard. One way to produce lactic acid is to
do a “wall sit,” supporting yourself against a wall in a sitting
position. Try doing this for a few minutes. What do you feel in
your thigh muscles?
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