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Objective: You will be able to write the equation of photosynthesis.

Objective: You will be able to write the equation of photosynthesis. Do Now: Read “Autotrophs and heterotrophs” on p. 201 Differentiate between autotrophs and heterotrophs. Photosynthesis Equation. 6CO 2 + 6H 2 O C 6 H 12 O 6 + 6O 2 Carbon + Water Glucose + Oxygen Dioxide. Bromothymol.

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Objective: You will be able to write the equation of photosynthesis.

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  1. Objective:You will be able to write the equation of photosynthesis. Do Now: • Read “Autotrophs and heterotrophs” on p. 201 • Differentiate between autotrophs and heterotrophs

  2. Photosynthesis Equation 6CO2 + 6H2O C6H12O6 + 6O2 Carbon + Water Glucose + Oxygen Dioxide

  3. Bromothymol • Used to test for the presence of carbon dioxide (CO2) • If CO2 is present it is a yellow color • If CO2 is NOT present it is a blue color

  4. Objective:You will be able to identify and give the function of the parts of a leaf. Do Now: • Read “Light and pigments” on p. 207 • List the FOUR things that plants need to have for photosynthesis

  5. Leaf cross section Vein Mesophyll CO2 O2 Stomata Figure 10.3

  6. Mesophyll Chloroplast 5 µm Outer membrane Thylakoid Intermembrane space Thylakoid space Granum Stroma Inner membrane 1 µm Chloroplasts: The Sites of Photosynthesis

  7. Activity • View a leaf slide under medium power • Locate the stomata • They should be on the bottom, if they are on top you slide is upside down. • Draw a small region of the leaf • Label the various parts of a leaf that we learned about

  8. Objective:You will be able to identify experimental variables Do Now: • Read “Setting up a controlled experiment” on p. 9 • Differentiate between manipulated and responding variables

  9. Controlled Experiments • Have an independent variable • The “thing” that you are changing • Have a dependent variable • The “thing” that is affected when you change the independent variable • Manipulated variable? • Responding variable?

  10. Example • Which color light works best for photosynthesis? • What is the: • Independent (manipulated) variable? • Dependent (responding) variable?

  11. Controlled experiments • Also use one setup known as the control group • A control group is where the manipulated variable is removed • You can think of the control group as being used for comparison

  12. Examples of controls • What color light is best for photosynthesis? • Control is one that does not have a particular color of light. • Will plants grow more if fertilizer is added? • Control is the setup that does not get the fertilizer

  13. You try • What affect does the intensity of light have on photosynthesis? • Using a partner come up with the: • Manipulated variable • Responding variable • Control group

  14. Problems • Will plants carry out more photosynthesis if they are given more CO2? • Will plants grow more if they are exposed to “dark light”? • Can plants produce more oxygen if you talk to them? • What type of music will cause plants to release more oxygen? • What effect does temperature have on the growth of plants?

  15. Objective:You will be able to explain how plants can absorb light for photosynthesis. Do Now: • Read “Light and pigments” again on p. 207 • What colors of light are absorbed by a plant?

  16. Mesophyll Chloroplast 5 µm Outer membrane Thylakoid Intermembrane space Thylakoid space Granum Stroma Inner membrane 1 µm

  17. 1 m 106 nm 10–5 nm 106 nm 1 nm 10–3 nm 103 nm 103 m Micro- waves Radio waves Gamma rays X-rays UV Infrared Visible light 380 450 500 550 600 650 700 750 nm Shorter wavelength Longer wavelength Lower energy Higher energy Figure 10.6

  18. Light Reflected Light Chloroplast Absorbed light Granum Transmitted light Figure 10.7

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