Photosynthesis Turning Light into Life

What is Photosynthesis? Autotrophs convert Sunlight  to Chemical Energy

Plants provide: Chemical energy on which all life depends Oxygen – plants created our atmosphere Materials – shelter, clothing, medicine Food – for (almost) all other life form

CO 2 + H 2 O  C 6 H 12 O 6 + O 2  Materials Required for Photosynthesis:  Sunlight – provides energy  Carbon Dioxide – provides carbon  Water – provides electrons  & enzymes to put everything together!  Oxygen is a “waste product” after electrons have been removed from water

Where does photosynthesis take place?

Leaf Structures Cuticle & epidermis protect plant Stomates allow gases in and out Veins in leaf transport water, nutrients Xylem - water & minerals up from roots Phloem - food from leaves to plant

Leaf Structures Mesophyll = middle leaf Palisade layer is where most photosynthesis takes place Cells have many chloroplasts Spongy mesophyll allows gases to circulate

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