•Essentials of
Photosynthesis and
Respiration
December
•Science Fair Update
7-8, 2009
•Make the Connection
between Photo &
Respiration
•Active Lab involving
Respiration
•Work to be done at Home
Warm Up – What do we
know? Diagnostic – 5 Stars
• What is photosynthesis?
• What is respiration?
• What do you need for these
processes to occur?
– Ingredients? End products?
Chemicals? Formula’s?
• How are they related?
Essential Concepts:
Photosynthesis and
Respiration
1. Understand how cells get their energy
2. Explain in your own words what
photosynthesis means
3. Write the “ingredients” and “final products”
of photosynthesis in words and chemical
formulas
4. Describe the RESPIRATION process
5. Illustrate the cycle in which ENERGY flows
between plants and animals in nature
6. Understand that mass IS conserved in
nature
Photosynthesis
Four Ingredients needed
- Chloroplasts - part of a plant cell that
capture sun’s energy
- Sun – Energy reaches the Earth
- Carbon Dioxide – CO2 - gas in the air –
enters plant through the stomata
- Water (H2O) from the soil
Photosynthesis
Two PRODUCTS (end up with)
• A sugar called GLUCOSE
symbol = C6H12O6
•
Oxygen gas (O2) (waste product)
EQUATION that Describes
PHOTOSYNTHESIS
6 H2O + 6 CO2 + Sun Energy + Chloroplasts
C6H12O6 + 6 O2
6 waters + 6 carbon dioxides will make 1 sugar
molecule and 6 oxygen molecules
Introduction to Respiration
Process in which animals CONVERT
stored energy in sugars to put to
use for living (movement etc)
•
•
Need 2 things  Oxygen and
Sugar
Results in  Energy and Carbon
Dioxide and Water
Respiration
6 O2 + C6 H12O6
Energy for use + 6 CO2 + 6 H2O
Journal Entry
• What ingredients do you need to
have photosynthesis occur?
• What are the results (Products) if
photosynthesis can occur
• Write word and chemical formula
answers
Photosynthesis and
Respiration Assignments
Due Monday
Photosynthesis Questions
•
#1 and #2 + Job Qualification (page 48)
Respiration Questions
•
Page 53 # 1 (a,b,c,d) and #2 (a,b,c)
Due Next Wednesday
• Drawing that shows relationship
between Photosynthesis and respiration
• (see next slide for details)
Illustrate the Process
• Develop a Poster that represents the
Photosynthesis and Respiration Cycle
• Criteria:
– Show the connection between the Sun, plants
and animals.
– Include names and Chemical formulas for each
“ingredient” or “product”
– Properly “Name” each step of the process
– Include how many of each “part” are required to
make the process work
Is it a good Learning Tool?
____ /10
Show the connection between
the Sun, plants and animals
_____ /5
Include names and Chemical
formulas for each “ingredient” or
“product”
_____ /5
Properly “Name” each step of
the process
Include how many of each “part”
are required to make the process
work
Overall Pride in your work
_____ /3
_____ /7
_____ /5
Photosynthesis and
Respiration Assessment
Use as much detail as possible to
clearly answer the following
prompt:
1. Support the statement that
“Photosynthesis and Respiration
are involved in a cycle that must
exist for life to survive on Earth”
Need to add chemical formulas and quantities to this
template
The Cycle
Photosynthesis
occurs
Energy from
Sun – Helps
plant
Water and CO2
used for
Photosynthesis
Product of Respiration –
animals healthy and
happy
Product of
Photosynthesis (plant
happy and growing)
Chloroplasts
capture suns
energy
Water and Carbon
Dioxide
Sugars and Oxygen
Use Sugars
and Oxygen
to Respire
Waste
Products are
Respiration –
Energy released for
Demo to get kids thinking
1. Make observations of the solution
in the beaker?
2. What will happen when Mr. Blank
drinks the solution?
3. What will happen if Mr. Blank blows
through the straw into the solution?
4. Conduct Demo
5. Record observations and try to
explain it.
Explain BTB
• Indicator that changes color based
on pH
• Carbon Dioxide is an acid
• Adding Carbon Dioxide changed the
pH of the solution
• Blue if pH>6.8
• Clear/Yellow if pH < 6.8
BTB is a tool for our lab
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Turn to page 54
Read problem statement as a class
Make a hypothesis (write in journal)
Discuss as a class on how we could do this experiment
What is a controlled experiment?
Volunteers (up to 4 students)
Need timers (involve as many as possible)
Need Recorder of data
Activity – Suggestions? Safe?
Conduct Experiment
Every student write down observations and data table
Write up your class lab results based on the following slide
(Handout to each student)
• Work hard and we’ll finish this in class on Thursday – Ms.
Ryan will judge due date
Exhaling Carbon Dioxide
Lab
page 54
• Lab Write-Up
– Problem Statement
– Hypothesis (Statement answering Part 2 #5
question)
– Materials and Procedures (in your own words)
– Data
• Drawing showing colors of beakers
• Any time measurements explained
– Results
• Answer Analyze and Conclude # 1,2,3,4
– Conclusion
• Answer Analyze and Conclude Problem # 5 and develop
an experiment to answer “More to Explore” - -You will not
be conducting the test
Lab – Class Collects Data
together
Student
Time it took to
change color
(no exercise)
14.86 seconds
Time to
change after
exercise
#3
11.36
seconds
10.72 seconds 7.24
seconds
14.6 seconds 10.92 sec
#4
23 seconds
17 seconds
#1
#2
Lab – Class Collects Data
together
Student
Time it took to
change color
(no exercise)
Time to
change after
exercise
#A Sophie
12.99 yrs old
Trumpet
7.55
5.0
#B Jaelynn
12.5 Flute
8.24
4.68
#C Max B
Sings 13.1
6.68
4.0
#D Mitchell
8.2
13.2 Trumpet
4.6
Exhaling Carbon Dioxide
Lab
page 54
• Lab Write-Up
– Problem Statement
– Hypothesis (Statement answering Part 2 #5
question)
– Materials and Procedures (in your own words)
– Data
• Drawing showing colors of beakers
• Data table
– Results
• Answer Analyze and Conclude # 1,2,3,4
– Conclusion
• Answer Analyze and Conclude Problem # 5 and develop
an experiment to answer “More to Explore” - -You will not
be conducting the test
Homework
• Photosynthesis
– Question 1
– Question 2
– Job Qualification
• Respiration Questions