Photosynthesis
and
Cell Respiration
1 Minute Quick Write
What do plants naturally need
to survive?
What is photosynthesis?
Photosynthesis is process that plants use where
sunlight energy is taken in and converted to food
molecules (chemical energy called glucose)
Which part of the plant absorbs the sunlight
needed for the process of photosynthesis?
A Closer look at the Leaf
On the cellular level, where does
photosynthesis take place?
How do plants get their color?
From the light absorbing pigment, chlorophyll, found in the
chloroplast.
The process of PHOTOSYNTHESIS
occurs in two phases:
1. Light Reactions (Light Dependent)
this occurs within the thylakoid (stacks)
2. Dark Reaction (Calvin Cycle / Light
Independent)
this part occurs in the Stroma (space)
Light Reactions
Dark Reactions (Calvin Cycle)
C6H12O6
Let’s combine the light reactions and dark reactions to
create the equation for Photosynthesis?
C6H12O6
(Sugar)
What are the reactants?
What are the products?
Use your manipulatives to create the
equation for photosynthesis
(make sure you balance your equation)
Reactants
Products
Write out your correct balanced equation of photosynthesis.
Does your equation look like the
one below?
Check your understanding
Explain the process of Photosynthesis to
a neighbor using the following terms :
carbon dioxide
glucose
oxygen
process
chloroplast
light energy
food
gas
water
plants
There is a saying “If you talk to a
plant, the plant will grow”
Explain how that phrase is
relevant and what processes are
taking place.
Do these two processes work in a
cycle? Explain you answer.
Now let’s take a look at
Cellular Respiration
• The end products of Photosynthesis are
what?
• Can we use the glucose in its current form if
the molecules are bound together?
Cellular Respiration
• If glucose is used and energy is
produced, where do you think
cellular respiration takes place?
• What types of cells have
mitochondria?
Mitochondria
• Mitochondria convert
chemical energy stored in
food (glucose, C6H12O6 )
into energy (ATP) that is
more convenient for the
cell to use.
• That process is called
cellular respiration
Cellular Respiration
Photosynthesis and Cellular
Respiration are opposites
• If the reactants for Photosynthesis are light
energy, 6H20, and 6CO2 and the products
are C6H12O6 and 6O2, what are the reactants
and products for cellular respiration? (use
your manipulatives) Remember, light energy cannot
be produce so what type of energy will be produced?
Reactants
Products
Write out your correct balanced equation of cellular respiration.
Does your Cellular Respiration
Formula look like this one?
6O2 + C6H12O6
6CO2 + 6H20 + ATP (energy)
In your own words, explain what you
think this analogy is saying?
Check your understanding
Why do you think cells under go the process
of cellular respiration?
Explain the process of cellular respiration
using the following terms:
carbon dioxide
glucose
oxygen
process
Mitochondria
food molecules
cells
gas
ATP
water