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3.  All living things require ENERGY to power all the work that happens inside of their cell(s)  Organisms can fall into two categories, based on the source of their  Organisms can fall into two categories, based on the source of their food:   Autotrophs : Make their own food   Heterotrophs : Have to eat/absorb their food Review: Think of this…

4. Through photosynthesis !   The process by which the energy in sunlight is stored in the bonds of glucose. Ex: photosynthesizing organisms: the green parts of plants, algae, bacteria, protists How can autotrophs make their own food?

5. THE BIG PICTURE SUN Glucose ATP PHOTOSYNTHESIS CELLULAR RESPIRATIO N

6. General formula for photosynthesis IMPORTANT!!! Word equation: Water + Carbon Dioxide Oxygen + Glucose Chemical equation: 6H2O + 6CO2 6O2 + C6H12O6 sunlight

7. General formula for photosynthesis IMPORTANT!!! Word equation: Water + Carbon Dioxide Oxygen + Glucose Chemical equation: 6H2O + 6CO2 6O2 + C6H12O6 sunlight product s reactan ts

9.  Photosynthesis occurs in the chloroplasts of plant cells. These are specialized cell structures. Where does photosynthesis occur? Chlorophyl l pigment

10. The reaction begins in chlorophyll, which is a type of pigment found in chloroplasts.  A pigment is a light–absorbing molecule. It can absorb the energy from light. Chlorophyl l pigment

11. The reaction begins in chlorophyll, which is a type of pigment found in chloroplasts.  Pigments absorb some wavelengths of light and reflect others.  The color seen by your eyes is the color that the pigment reflects. What color do you see? green

12. The Photosynthesis Reaction Has 2 Parts 1.Light-DEPENDENT reactions: occur in the thylakoid  Requires sunlight and water. Produces ATP and oxygen. Chlorophyl l pigment

13. The Photosynthesis Reaction Has 2 Parts 1.Light-DEPENDENT reactions: occur in the thylakoid  Requires sunlight and water. Produces ATP and oxygen. Chlorophyl l pigment

14. The Photosynthesis Reaction Has 2 Parts 2.Light-INdependent reactions occur in the stroma  Require ATP and CO2. Produces glucose. Chlorophyl l pigment

15. The Photosynthesis Reaction Has 2 Parts 2.Light-INdependent reactions occur in the stroma  Require ATP and CO2. Produces glucose. Chlorophyl l pigment

16. Fossil fuels are essentially compressed organic material  compressed carbon compounds, like glucose, that were made through photosynthesis millions of years ago! Photosynthesis from the past