Photosynthesis
Chapter 8
Biology
Ms. Meek
Hook
 If
all the plants in the world died would we
still be able to live?
 Silently
 Write
down your thoughts
 Be ready to share out your thoughts
Objective
 3:6
SWBAT describe photosynthesis
including its purpose and location within a
cell.
I
can explain where photosynthesis occurs
and know how to explain the process.

STANDARD 1F: Students know usable energy is captured from sunlight by
chloroplasts and is stored through the synthesis of sugar from carbon dioxide.
IBE
 What
do plants need in order to live.
Vocabulary
 Photosynthesis
 Chloroplasts
 Chlorophyll
Start making a vocabulary chart for each
word in your notebook
1st Science Definition
2nd Picture
3rd Your Definition (HW)
4th Write a sentence using the word (HW)
Review
 What
are reactants and product?
Notes
 Use
note template to fill in the key terms
 REMINDER:
During notes you are silent
while the teacher is talking. If you have a
question or comment raise your hand and
wait silently to be called on.
Energy & Life
Autotrophs: Use light energy from the sun to
make their own food.
Example: Plants
Heterotrophs: Cannot use the sun’s energy
directly and must obtain energy from foods
they consume.
Example: Animals
Think Box
When a tiny seed grows into a tall tree
where does it get its mass?
Photosynthesis
 Plants
use the energy of sunlight to
convert water and carbon dioxide into
high energy carbohydrates, and oxygen
and a waste product.

Photosynthesis happens in two
stages.
 Stage
1: Chloroplasts capture sunlight
and turn it into energy.
 Stage
2: Plant cells use energy from
stage 1 as well as hydrogen (H) and
carbon dioxide (CO2) to produce
sugars such as glucose.




What happens during photosynthesis can be
represented using a chemical equation.
A chemical equation shows what molecules or
substances are involved and how they combine
or divide during a chemical process or reaction.
Photosynthesis can be described using the
equation above.
The substances on the left of the arrow are the raw
materials or substances that begin the reaction
and the substances on the right of the arrow are
the products that are created by the reaction.
Photosynthesis Equation
 Carbon
Dioxide+ Water -> Sugars + Oxygen
Photosynthesis uses the energy of sunlight to
convert water and carbon dioxide into high
energy sugar and oxygen
Photosynthesis
 Takes
place in the chloroplasts
 Requires light and chlorophyll
 Pigments
are light absorbing molecules
 Plants principal pigment is Chlorophyll
 Green light is reflected by leafs
Quick Check
Cube activity
 Rate
your understanding
 Spicy
(Feeling Great)
 Medium(Feeling Good)
 Blue Group: Mild (Feeling OK)
 Now
I will put you in groups 
Cube Activity
 Work
with you group
 Together answer every question
 Write down questions and answers in your
notebook 
 Quiet voice
Remember: banana
 Only
1 students work per group is
checked. I decide who all that is
everyone's grade. WORK TOGETHER
Exit Ticket
 Silently
 By
yourself
 No Notes
When you are done turn it in to the clear bin

Today’s Objective
 3:7
SWBAT explain the generalized
reaction for photosynthesis.
Lab Review Day
 Get
out lab worksheet
 Discuss Process
 Watch Video
 Graph Results
 Work on Lab Report
Discussion Questions
1.
2.
3.
4.
Which cup exhibited a faster rate of
photosynthesis? With CO2 cup or
Without
What data supports this?
So, what effect did CO2 concentration
have on the rate of photosynthesis?
What errors could have occurred during
this lab?
Gallery Walk
 Visit
every station silently
 Write down your thoughts
 Put a ? Or *
Line Graphs
 Watch
how to create a line graph
 Create a line graph with your group


Each student makes their own
Be ready to present data
Lab Reports
Review Examples
 Write out Hypothesis
 Materials
 Procedure: In your own words
 Results
 Conclusion
 TYPE FOR HW: DUE THURSDAY 
Grade Reports are due this weekend
Chlorophyll &
Chloroplast
Ms. Meek
Objectives
 3:8
SWBAT explain the importance of
chlorophyll in photosynthesis.
 3.9 SWBAT label a picture of the structure
of the chloroplast (stoma, thylakoids,
grana)
Importance of Photosynthesis
 Think,
Pair, Share
 Be ready to share your
partners response.
Chlorophyll
 Chlorophyll
is a molecule of chloroplast
 Chlorophyll absorbs sunlight
 Gathers suns energy with light absorbing
molecules called pigments
 Does not absorb green,
it is reflected
Photosynthesis
 photo”
means light, “synthesis” putting
together
 Chlorophyll captures the light energy
needed to drive photosynthesis
 Carbon
Dioxide + Water + Chlorophyll
and Sunlight = Oxygen + Sugar
Think Box
 How
do solar panels work?
Chloroplasts
Stroma are regions outside the thylakoid
membranes in chloroplasts
Thylakoids are saclike membranes found in
chloroplasts
Grana are stacks of thylakoids
Chloroplast Diagram
Complete Worksheet
 Quietly
work on worksheet
 If you have a question raise your hand
 Underline point that discuss Chlorophyll
 Be
prepared to share answers with class
Quiz
 Silently
 Answer
all questions
 Follow instructions
In what ways can we use
sunlight?
Objectives
 3:10
SWBAT state what happens in the
light dependent (light collection) and
light independent (using energy for
converting CO2 into sugars) reactions in
generalized terms.
I
can explain what happens during light
dependent and light independent
reactions.
Light Dependent Reactions
 Require
LIGHT
 Plants require light to grow
 Reaction use energy from light to
produce
 ATP
 NADPH
Light Dependent Reaction
 Produces
oxygen gas and converts ADP
and NADP+ into energy carriers ATP and
NADPH
 This
reaction is the source
of nearly all of the
oxygen in Earth’s
atmosphere
Light Independent Reaction
 Does
not require light
 Called
 Uses
the Calvin Cycle
ATP and NADPH to produce highenergy sugars
Think Box
How do you think the amount
of light affects plant growth?
Light Independent Reaction
(Calvin Cycle)
 Produces
High-Energy Sugars
 These
are high energy compounds that
can be stored for a long time
 Removes
carbon dioxide from the
atmosphere and produces energy rich
sugars.
Light Independent Reaction
(Calvin Cycle)
 Plant
uses sugars to build more complex
macromolecules such as cellulose that it
needs for growth and development.
 Organisms
eat the plants and can use
that energy stored in carbohydrates.
Post it Questions
 Create
a question for our game!
 Write it on the post it
 Can be



True or false
Multiple choice: Create answer choices
Single response
Game Time
 Groups
3-4
 One white board per group
 2 minutes to answer question with group
 Use a quiet voice
 WINNING
points 
GROUP gets 5 extra notebook
Create a Foldable



Photosynthesis
Light Dependent Reaction
Light Independent Reaction
Work independently
Use Quiet Voice
Draw Pictures and my definitions in your own
words. Be ready to share yours 
If you finish early read Page 210-213 and add
more key facts
EXIT TICKET
 Complete
 By
Silently
yourself
 No Notes
 Explain your Claims 