1. Do now activity #1 How come animals do not need to do photosynthesis?
Where does photosynthesis happen in plant cells?
What do plants produce from photosynthesis?
What type of macromolecule do plants produce from photosynthesis?

2. Section 3-1: Photosynthesis
Essential Question:
What do plants use for photosynthesis? What do they make?
Section 3-1: Photosynthesis
Learning Target
Use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.

3. announcements Biology Tutoring this week: Lunch B (Tuesday & Thursday)
7:00AM (Monday – Friday)
After school Biology Tutoring: Thursday
You must sign up for retakes during Biology Tutoring. 7:00AM retakes only.

4. overview Photosynthesis -- plants convert sunlight into sugar
photo = light
synthesis = to make

5. Photosynthesis equation
light
6CO H2O  C6H12O O2
carbon dioxide + water  glucose + oxygen

6. Photosynthesis equation
Photosynthesis the process that uses energy from sunlight to transform
________ _____________ and ________
into
___________ and ___________
Carbon dioxide, water, oxygen, carbohydrates

7. Photosynthesis equation
Uses
Light energy
carbon dioxide (CO2)
water (H2O)
Makes
oxygen (O2)
glucose (C6H12O6)

9. Stomata = “mouth”

10. Light & pigments
Plants have pigments

12. Pigments: light absorbing molecules that capture the sun’s energy
Light & pigments
Pigments: light absorbing molecules that capture the sun’s energy

13. Light & pigments
Pigments: light absorbing molecules that capture the sun’s energy
We can see reflected light. We cannot see absorbed light.

14. ROY G BIV Shortest wavelength = larger amount of energy
Longest wavelength = Least amount of energy
Shortest wavelength = larger amount of energy

16. Plants look green because chlorophyll reflects green light.

17. Chlorophyll is a pigment found in __________
Light & pigments
Chlorophyll is a pigment found in __________
plants

18. Chlorophyll makes plants ________ .
Light & pigments
Chlorophyll makes plants ________ .
green

19. Light & pigments
2 types:
Chlorophyll a
Chlorophyll b

20. Light & pigments These pigments absorb red and blue light well.
They do not absorb _______ light very well.
Pigments Include:
chlorophyll a
chlorophyll b
absorbs well in red and blue but poorly in green
plants also have red , yellow and orange pigments that absorb other colors
energy is transferred to electrons in pigments when they absorb sunlight

21. Is the color green being reflected or absorbed by plants?

23. Photosynthesis takes place in the chloroplasts of plants
Inside a chloroplast
Photosynthesis takes place in the chloroplasts of plants

24. Inside a chloroplast Chloroplasts have two parts:
thylakoids: saclike membranes found in chloroplasts
Many thylakoids = grana
pigments capture sunlight (light-dependent reactions)

25. Inside a chloroplast Chloroplasts have two parts:
Stroma: space surrounding the thylakoids (Calvin cycle)

26. The chloroplast