1. Discovery of Photosynthesis

2. Photosynthesis: Is the process by which sunlight energy is transferred into chemical energy stored in organic compounds.

3. Organelle Responsible for Photosynthesis Chloroplast: Organelle where photosynthesis takes place.

4. Chloroplast Pigments Pigments: Are compounds that absorbs light. Located in the thylakoids are pigments called, chlorophylls. Most common chlorophylls ▫Chlorophyll a ▫Chlorophyll b (accessory pigment)

5. Chloroplast Pigments Chlorophyll a ▫Directly involved in light reactions of photosynthesis Chlorophyll b ▫Assist chlorophyll a in capturing light energy Carotenoids ▫Accessory pigment

6. Chloroplast Pigments

7. Discovery of Photosynthesis Jan Van Helmont- Looked at plant mass. Where does a plant’s mass come from? Mass came from water and CO2 in the air.

8. Discovery of photosynthesis Joseph Priestley Looked at the products that plants give off and found that plants give off oxygen.

9. Photosynthesis Equation Carbon Dioxide + Water + Sunlight  Food and Oxygen 6CO 2 + 6H 2 O+ Sunlight  C 6 H 12 O 6 + 6O 2 Reactants: Go into the chemical reaction Products: Substances that are formed from the reaction

10. Autotrophs vs Heterotrophs Autotrophs: Organisms that can make their own food (Plants) Heterotrophs: Organisms that need to take energy from the foods they eat. (Animals)

11. Energy-Storing Compounds Two types of Energy Compounds ▫NADP+  NADPH ▫Adenosine Triphosphate (ATP) Energy Levels ▫AMP (Low Charge) ▫ADP (Half Charge) ▫ATP (Full Charge) AMPADPATP