December

7-8, 2009

•Essentials of Photosynthesis and Respiration

•Science Fair Update

•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 AssignmentsDue MondayPhotosynthesis 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

_____ /3

Include how many of each “part” are required to make the process work

_____ /7

Overall Pride in your work _____ /5

Photosynthesis and Respiration AssessmentUse 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”

The Cycle

Product of Photosynthesis (plant happy and growing)

Sugars and Oxygen

Respiration – Energy released for use

Product of Respiration – animals healthy and happy

Water and Carbon Dioxide

Energy from Sun – Helps plant

Photosynthesis occurs

Use Sugars and Oxygen to Respire

Waste Products are

Chloroplasts capture suns energy

Need to add chemical formulas and quantities to this template

Water and CO2 used for Photosynthesis

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 Demo5. 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• 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 Labpage 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)

Time to change after exercise

#1 14.86 seconds 11.36 seconds

#2 10.72 seconds 7.24

seconds

#3 14.6 seconds 10.92 sec

#4 23 seconds 17 seconds

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

13.2 Trumpet

8.2 4.6

Exhaling Carbon Dioxide Labpage 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