Photosynthesis Investigation Two
Name ______________BL__
Lesson One: Assembling Reactants (Oxygen=Green, Hydrogen = Blue, and Carbon=Red)
1a. Draw a water molecule, H2O.
b. Draw a carbon dioxide molecule.
c. How many molecules of water were you able to make? _______
d. How many molecules of carbon dioxide were you able to make? ______
e. Sunlight is being absorbed by what pigment? __________________________
Lesson Two: Constructing Products
2a. How many glucose molecules did you make? _____
b. How many oxygen molecules did you make? ____
Learning Review
1.
Write the total number of atoms you needed in the reactants for photosynthesis.
Oxygen __________
2.
Carbon __________
Write the total number of atoms you needed in the products of photosynthesis.
Oxygen __________
3.
Hydrogen _________
Hydrogen _________
Carbon __________
What do you notice about the number of atoms in the reactants and products?
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Evaluation
1.
When you shook up the carbon dioxide and water molecules to make the glucose and oxygen molecules
you added energy to break molecular bonds. In nature, where does this energy come from?
_____________________________________________________________________________________
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2. During photosynthesis, light energy is changed to stored energy. In which product is the energy stored?
________________________________________________________________________________________
3. Photosynthesis can take place only in certain cells. What do all cells in which photosynthesis takes place
have in common? __________________________________________________________________________
______________________________________________________________________________________
4. An astronaut is about to embark on a space mission in which they will be confined to the cabin of their
space ship for a long time. Why might an astronaut wish to create a greenhouse full of plants within his or her
space ship? Explain.
________________________________________________________________________________
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Cellular Respiration Investigation One
Lesson One: Assembling Reactants (Oxygen=Green, Hydrogen = Blue, and Carbon=Red)
1a. How many molecules of oxygen were you able to make? _______
b. How many molecules of glucose were you able to make? _______
Lesson Two: Constructing Products
2a. How many carbon dioxide molecules did you make? _______
b. How many water molecules did you make? _______
c. How many molecules of ATP were released from the glucose molecule? _______
Learning Review
1. Write the total number of atoms you needed in the reactants for cellular respiration.
Oxygen __________
Hydrogen _________
Carbon __________
2. Write the total number of atoms you needed in the products of cellular respiration.
Oxygen __________
Hydrogen _________
Carbon __________
3. What do you notice about the number of atoms in the reactants and products?
________________________________________________________________________________________
________________________________________________________________________________________
Evaluation
1. What happens during cellular respiration?
_____________________________________________________________________________________
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2. How do the reactants and products of respiration relate to what we(humans) take in and give off?
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3. How are plants and animals dependent on one another? ________________________________________
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4. Seventh graders were running in gym class and noticed that they would breathe heavier (and take in more
oxygen) when they were active, as opposed to when they were passively sitting in other classes. Why would
the seventh graders need more oxygen when they were active?
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