Comparing Photosynthesis and Respiration The most important chemical reaction in the world is… The chemical reaction for photosynthesis is PHOTOSYNTHESIS 6CO2 + 6H2O + energy C6H12O6 + 6O2
Jan 17, 2016
Comparing Photosynthesisand Respiration
The most important chemical reaction in the world is…
The chemical reaction for photosynthesis is
PHOTOSYNTHESIS
6CO2 + 6H2O + energy C6H12O6 + 6O2
Comparing Photosynthesisand Respiration
PHOTOSYNTHESIS
6CO2 + 6H2O + energy C6H12O6 + 6O2
Carbon Dioxide
Water
Sunlight
Sugar
Oxygen
Comparing Photosynthesisand Respiration
Stage 1
PHOTOSYNTHESIS
Chlorophyll in the Chloroplasts captures sunlight
Comparing Photosynthesisand Respiration
Stage 2
PHOTOSYNTHESIS
The cell uses the captured sunlight, carbon dioxide and water to make food
Comparing Photosynthesisand Respiration
Stage 2
PHOTOSYNTHESIS
Carbon Dioxide enters the plant through Stomata -small openings on the underside of the leaf
COMPARING PHOTOSYNTHESIS AND RESPIRATION
THE PHOTOSYNTHESIS - RESPIRATION CYCLEPHOTOSYNTHESIS
RESPIRATION
Organisms Use
Organisms Produce
Plants Produce
Plants useCarbon Dioxide
Water
Energy
Sugar
Oxygen
Comparing Photosynthesisand Respiration
The process by which cells obtain energy from glucose
The chemical reaction for respiration is
RESPIRATION
C6H12O6 + 6O2 6CO2 + 6H2O + energy
Comparing Photosynthesisand Respiration
RESPIRATION
C6H12O6 + 6O2 6CO2 + 6H2O + energy
Carbon Dioxide
Sugar Water
Oxygen
Comparing Photosynthesisand Respiration
RESPIRATION Stage 1
Takes place in the cytoplasm
Molecules of glucose are broken down into smaller molecules
Oxygen is NOT involved
Small amount of energy is released
Comparing Photosynthesisand Respiration
RESPIRATION Stage 2
Takes place in the Mitochondria
Small molecules are broken down into even smaller molecules
Oxygen is required
A great deal of energy is released
Carbon dioxide and water are also produced
COMPARING PHOTOSYNTHESIS AND RESPIRATION
THE PHOTOSYNTHESIS - RESPIRATION CYCLEPHOTOSYNTHESIS
RESPIRATION
Organisms Use
Organisms Produce
Plants Produce
Plants useCarbon Dioxide
Water
Energy
Sugar
Oxygen
Sugar
Oxygen
Carbon Dioxide
Water
Energy
COMPARING PHOTOSYNTHESIS AND RESPIRATION
THE PHOTOSYNTHESIS - RESPIRATION CYCLEPHOTOSYNTHESIS
Plants Produce
Plants useCarbon Dioxide
Water
Energy
Sugar
Oxygen
Comparing Photosynthesisand Respiration
Testing Photosynthetic Rate of Elodea
Elodea – a common water plant
Elodea releases bubbles of oxygen as it photosynthesizes
Freshly cut Elodea stems produce more bubbles than the leaves
Comparing Photosynthesisand Respiration
Testing Photosynthetic Rate of Elodea
Materials Elodea
PlantsScissors Large
ContainerClear test tube Wate
rSunlight
Comparing Photosynthesisand Respiration
Testing Photosynthetic Rate of Elodea
ProceduresFill the large container half full of water
Cut the stem of the Elodea plant at an angle (for greater surface area)
Comparing Photosynthesisand Respiration
Testing Photosynthetic Rate of Elodea
ProceduresInsert the plant, cut stem first, into the test tube
Fill the test tube to overflowing with water
Comparing Photosynthesisand Respiration
Testing Photosynthetic Rate of Elodea
ProceduresCover the top of the test tube with your thumb
Invert the test tube over the beaker and put the test tube with your thumb still covering the opening into the beaker
Comparing Photosynthesisand Respiration
Testing Photosynthetic Rate of Elodea
ProceduresRelease your thumb and gently settle the test tube on the bottom of the container
Place the beaker and test tube in sunlight or under a bright lamp
Comparing Photosynthesisand Respiration
Testing Photosynthetic Rate of Elodea
ProceduresAt 5 minute intervals for a total of 15 minutes, record the number of bubbles producedMake a graph of your findings
Have someone in your group report out to the class
COMPARING PHOTOSYNTHESIS AND RESPIRATION
THE PHOTOSYNTHESIS - RESPIRATION CYCLE
RESPIRATION
Organisms Use
Organisms Produce
Sugar
Oxygen
Carbon Dioxide
Water
Energy
Comparing Photosynthesisand Respiration
Respiration and Carbon Dioxide
Bromthymol Blue (BTB)
An acid-base indicator that can be used to measure levels of carbon dioxide (CO2)
BTB changes color from blue to green and then yellow as it gets more acidic
Comparing Photosynthesisand Respiration
Respiration and Carbon Dioxide
Bromthymol Blue (BTB)
If carbon dioxide is removed from the solution it will become more basic and change color moving to blue
If carbon dioxide is added to the solution it will become more acidic and change color moving to green and then yellow
Comparing Photosynthesisand Respiration
Respiration and Carbon Dioxide
This experiment uses Bromthymol Blue to examine the relationship between exercise and the amount of carbon dioxide you produce
Comparing Photosynthesisand Respiration
Respiration and Carbon Dioxide
Materials2 plastic cupsBromthymol Blue solution
2 straws
Timer
Paper towels
Comparing Photosynthesisand Respiration
Respiration and Carbon Dioxide
Procedure
Label one cup “1” and the other cup “2”
Fill both cups to the marked line with BTB
Comparing Photosynthesisand Respiration
Respiration and Carbon Dioxide
Procedure
Record the color in both cups on your lab sheet
Place a straw in cup 1
Comparing Photosynthesisand Respiration
Respiration and Carbon Dioxide
Procedure
Have a group member blow through the straw into the solution until it changes color
Have a group member time how long it takes for the solution to change color
Comparing Photosynthesisand Respiration
Respiration and Carbon Dioxide
Procedure
Record how long it took for the solution to change color on your lab sheet
Remember the solution is changing color because you are exhaling carbon dioxide into it
Comparing Photosynthesisand Respiration
Respiration and Carbon Dioxide
Procedure
Predict how long it would take the solution to change color after exercise
Record your prediction on your lab sheet
Comparing Photosynthesisand Respiration
Respiration and Carbon Dioxide
Procedure
Design an experiment to test your prediction
This means a group member must do some form of exercise (like jumping jacks)
Comparing Photosynthesisand Respiration
Respiration and Carbon Dioxide
Procedure
The exercise should be something you can do “in place” near your tables
Only one group member will perform the exercise
Comparing Photosynthesisand Respiration
Respiration and Carbon Dioxide
Procedure
Write down the steps of your experiment
Get your teacher’s approval BEFORE you begin your experiment
Comparing Photosynthesisand Respiration
Respiration and Carbon Dioxide
Procedure
Follow the directions in the Analyze and Conclude section of your lab sheet to conduct your experiment and record your results