Name: ___________________________________________________Date: _______________Period: _____
Unit 3 Test Review: Photosynthesis and Light
Use your text book, homework and Pearsonsuccessnet notes to help you answer the review sheet questions.
Chapter 8-1: Energy and Life (page 201)
Key Vocabulary: autotroph, heterotroph, adenosine triphosphate (ATP)
1. Autotrophs are organisms that use ________________ for energy. Humans are an example of a
__________________, which means we need to eat organic material to obtain energy.
2. Examples of autotrophs are: ____________________________________________________________
3. ATP stands for _______________________________________________
4. The purpose of ATP in our cells is to provide ______________________________________________________
5. ATP can be used for such things as: _____________________________________________________________
6. Draw an ATP molecule in the box provided: 
7. Explain how the molecule of ATP
releases energy for your cells to use:
________________________________
________________________________
________________________________
________________________________
8. What does ADP stand for: _________________________________ How is this molecule different from ATP?
Explain: _________________________________________________________________________________
9. Sugar is a molecule that has 90 times more energy than ATP. Explain why we use ATP as energy instead of
releasing all of sugar’s energy all at once: _______________________________________________________
___________________________________________________________________________________________
___________________________________________________________________________________________
Chapter 8-2: Photosynthesis: An Overview (page 204)
Key Vocabulary: Photosynthesis, Pigment, Chlorophyll
1.
Van Helmont planted a tree in a pot of soil and added nothing to the pot except water, he grew it for 5 years. After 5 years the
tree had gained 75kg in mass, but the soil in the pot had lost virtually nothing! Van Helmont concluded that a large amount of
liquid mass of the tree came from the ______________ he had added. However, the physical mass of the plant had not come
from the soil. This was one of the first hints that lead scientists to later discover that the plants were gaining most of their
mass from ________________________ in the air.
2. Priestley conducted an experiment with a candle in a sealed jar and a small mint plant. He found that without the plant
present the candle would burn out due to lack of ___________________. With the mint plant present the plant produced
__________________________ allowing the candle _________________________________.
3. Jan Ingenhousz later proved that for Pristley’s experiment to work _________________________ was needed.
4. A combination of many scientists work over the years has provided us with an understanding of how plants work. Below
write the complete balanced formula for photosynthesis:
5. In order for photosynthesis to work it needs energy from the _________________. The sun’s energy come in many different
wavelengths, but only some wavelengths can be used to power photosynthesis. Energy from the sun, known as Visible Light,
has a wavelength from ___________ to _________ nanometers.
Those are the only wavelengths our eyes can detect for seeing. Plants
look green because they ________________ wavelengths of light
that are _______________ (around ________-________
nanometers). The light then enters our eyes and our brain tells us we
are seeing something _________________.
6. Pigments are molecules found in plants that ______________
__________________________________________________.
7. The two most common pigments found in plants are called:
_______________________ and ____________________.
8. Using the data table on the right to draw the absorbance of these two
pigment molecules (page 207 in your textbook) 
9. Color the numbers on x-axis of the graph to show what color light each wavelength would show.
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10. What color would 500nm be? ___________ What about 650nm? ________
11. How does a spectrophotometer work? Explain.
Chapter 8-3: The Reactions of Photosynthesis (page 208)
Key Vocabulary: Thylakoid, photosystem, stroma, NADP+, light-dependent reaction, ATP synthase, Calvin Cycle
Match each number on the diagram with the correct word below
A. _____Sun Light
B. ____Light Reaction
D. _____ATP
E. ____ADP
G. _____NADPH
H. ____Chloroplast
J. _____Granum
K. ____Stroma
M. _____H2O
N. ____Sugars
C.
F.
I.
L.
O.
____ Calvin Cycle
____NADP+
____Thylakoid Membrane
____CO2
____O2
1. Which organelle does photosynthesis take place in:
___________________________________
2. ____Which molecule has more energy
a. Glucose
b. ATP
3. ____Which molecule has more energy
a. ATP
b. ADP
4. ____Which molecule has more energy:
a. NADP+
b. NADPH
Use the drawing to identify which stage of the Light reaction best fits each Statement: A, B or C.
Statements
Answers
5. ____Excited Electrons are passed from
PS II to PS I
6. ____Excited electrons are passed off to
NADP+ to form NADPH
7. ____H2O is split apart into H+ and O2
8. ____H+ is brought into the cell through
active transport
9. ____Sun Light excites the electrons in
PSI
10. ____In which stage is NADPH made?
11. ____H+ moves out of the protein channel
12. What part of a plant cell is being shown
in this diagram: ___________________
________________________________
13. Fill in the drawing with the following
things in the correct locations:
Water, H+, sunlight, O2, e-, NADP+,
NADPH, ADP, ATP
14. At the end of the light reaction ________
and __________ are used to make
____________ into ____________
during the ____________ ___________,
which is also known as the __________
________________ _______________.
Pearsonsuccessnet
15. During the light reaction ATP is formed when ________ flows through ____________________ by the
process of _________________________________ this provides energy to attach a ___________ to an
__________ to form the energy molecule _____________.
16. The light reaction takes place in the _________________. It uses _____________ and releases
___________into the atmosphere. Two energy molecules that are created at the end of the light reaction are
_________________ and __________________ which are then used in the _____________ ___________.
17. The Calvin Cycle requires energy (electron) from ___________ and __________ to make _____________
into _____________. This all takes place in the ___________________ of the ______________________.
18. Draw a simple diagram of the Calvin Cycle:
Chapter 23-4: Leaves (page 595)
Key Vocabulary: Transpiration, guard cells, Stoma (Stomata)
1. Transpiration is ________________________________________________
_____________________________________________________________.
2. In the diagram below transpiration is shown. Explain the movement of water
from the soil to the atmosphere in complete sentences: ____________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
3. On the bottom side of leaves there are
microscopic openings called
_______________________. These are
important for a number of reasons: first plants need a way to bring in __________
from the ___________ as a source of ______________( name the element) to make
organic energy molecules such as __________________. While stomata are
opened they also lose ____________. Each time a molecule leaves another is
drawn up through the roots.
Chapter 23-4: Transport in Plants (page 599)
Key Vocabulary: Transpiration, adhesion, capillary action
4. If it is a hot dry day plants will ________________ their stomata to conserve
______________. If it is a warm sunny day with lots of water in the soil a plant
will probably _____________ their stomata to let _________________ ____.
5. If you were looking under the microscope at stomata on the leaf of two different
plants and you noticed that one plant had approximately 2 stomata per cm2,
while the other had 50 stomata per cm2: What type of environment would you
likely conclude each plant was originally from:
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Vocabulary Practice:
Throughout the first 3 pages of the review sheet there were vocabulary words listed for each section of
the book covered. This Data table is for you to choose some words that you want to improve on before
the test. Practice vocabulary by writing a word in the left hand column, try to define the word in your
own words, then use the word in a sentence to demonstrate that you understand the word.
Vocabulary Word
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
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Your Definition
Use it in a sentence