How is active transport different from passive
transport?
Chapter 3
Section 3

Where does the energy come from? Page 86
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To write the chemical formula for
photosynthesis.
To list the raw materials and end products for
photosynthesis.
To describe what happens during the process
of photosynthesis.
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Photo means light
Synthesis means putting together
Process that plants use to convert the sun’s
energy into food
Takes place in the chloroplasts in leaves of the
plants
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The sun provides energy for all living things
either directly or indirectly.
Autotrophs are organisms that make their own
food through the process of photosynthesis.
Heterotrophs are organisms that need to eat.

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Light is required
The energy of the sunlight
is captured by the
chlorophyll in the
chloroplast
http://www.osovo.com/diagram/photosynthesisdiagrams.htm
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Light is not required
The captured energy is converted into the
energy found in food
Raw materials needed are carbon dioxide and
water
Produces glucose and
oxygen
Also known as the
Calvin cycle
http://faculty.stcc.edu/nash/cells.htm
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Looking at Pigments page 89

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Place a sprig of elodea in a test tube and count
the bubbles that are released in 1 minute when
inside.
Take your test tube out and count the bubbles
that are released in 1 minute.
Is there a difference? What do you think makes
the difference? What does this difference
mean?

Stomata are the guard cells that allow gases to
enter and leave a leaf. They are located on the
underside of the leaf.
Scanning electron micrograph of Equisetum (horsetail or scouring rush)
epidermis. Note the oval stomatal apparatuses in the center of the stem.
The above image is from
http://www.mcs.csuhayward.edu/sem/images/horsel4.gif.
http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookPLANTANAT.html
Stomatal apparatus as seen on a leaf epidermal peel of corn. The above
image is from
gopher://wiscinfo.wisc.edu:2070/I9/.image/.bot/.130/Leaf/Corn_epidermal_pe
el. Note the two sets of guard cells.
http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookPS.html
Pea Leaf Stoma, Vicea sp. (SEM x3,520). This image is copyright Dennis
Kunkel at www.DennisKunkel.com, used with permission.
http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookPS.html
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Take a leaf and put clear nail polish on the
leave. Let dry and put a second coat of clear
nail polish on leaf.
When dry carefully peel the nail polish off of
the leaf. Place the nail polish on a microscope
slide and look at it under the microscope.
Count the number of stomata that you can
identify in the view of the microscope with out
moving it.
Do you find more stomata on the top or the
underside of the leaf?
Raw Materials

Carbon dioxide + Water
Needed but not used up
Sunlight and Chlorophyll
End Products

Glucose + Oxygen
http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookPS.html
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Needed for respiration
O2
CO2
http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookPS.html
6CO2 + 6H2O + light energy → C6H12O6 + 6O2
Carbon Dioxide + Water + Light Energy
produces or yields ( in chlorophyll )
Glucose + Oxygen
Guided Reading and study Workbook
pages 44-46.

What are the substances needed (raw
materials) for photosynthesis? What are the
substances (products) produced during
photosynthesis?

Isolate chlorophyll