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Photosynthesis Provides Energy to make LIFE possible! LIFE possible!

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What is Photosynthesis? Photosynthesis is a chemical reaction in which light energy is converted to chemical energy (stored in glucose). Photosynthesis is a chemical reaction in which light energy is converted to chemical energy (stored in glucose). Photosynthesis = chemical reaction Light E Chemical E (stored in glucose) Living things can eat glucose, we can't eat sunlight.

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Why is Photosynthesis important? Converts Energy into a form that makes LIFE possible! Living things can't eat sunlight, but they can eat glucose!

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Who carries out photosynthesis? Autotrophes containing the green pigment, chlorophyll. Autotrophes containing the green pigment, chlorophyll. This includes: The plant kingdom, Half" of the Protista (the algae) Half" the Moneran Kingdom (the blue-green algae).

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Where does photosynthesis occur? Most photosynthesis is occurring in the oceans! (The ocean covers 70% Earth) leaves of plants. leaves of plants. chloroplasts

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How can we summarize photosynthesis? In words: carbon dioxide + water + light energy glucose + oxygen + water As a chemical reaction: CO 2 + H 2 O + light energy C 6 H 12 O 6 + O 2 + H 2 O

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What raw materials are needed for the process of photosynthesis? chlorophyll Sunlight water carbon dioxide

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How does the structure of a plant help maintain homeostasis? Sunlight Absorbed by the chlorophyll in each chloroplast! Chloroplasts are found in the Palisade layer of a leaf!

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CO 2 diffuses in through the stomata O 2 diffuses out through the stomata

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H 2 O is taken in through the xylem tissue H 2 O transpires (exits) through the stomata

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Glucose produced during photosynthesis is pushed through the phloem to other parts of the plant that needs food!

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Reactants of Photosynthesis

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Products of Photosynthesis

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More in-depth Inside a chloroplastLight Dependent Reaction Thylakoids are arranged in stacks called grana. The chlorophyll inside the grana inside the grana absorbs light absorbs light blue and red. blue and red. Water and O 2 is absorbed. absorbed. ATP is produced.

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Light Independent Reaction (Dark Reaction) (Calvin Cycle) Uses CO 2 and ATP to produce high energy sugar. ATP ADP

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Factors that affect the rate of photosynthesis Amount of water available Temperature (Enzymes! 0-35 C) Intensity of light (not too much, not too little!)

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How do plants maintain homeostasis? Cuticle prevents water loss guard cells

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Exactly why is photosynthesis so important? Two big reasons: Two big reasons: glucose (sugar) oxygen

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What else is so great about sugar? Dehydration synthesis = cellulose starch

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To which "life function" is photosynthesis related? nutrition, autotrophic nutrition Nutrition = how organisms obtain the materials necessary for energy, growth, etc. Nutrition = how organisms obtain the materials necessary for energy, growth, etc. Autotrophic Nutrition

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What else should we remember about photosynthesis? Oxygen-Carbon Dioxide Cycle. Oxygen-Carbon Dioxide Cycle. oxygen factories removing CO 2 from the atmosphere. removing CO 2 from the atmosphere. Increasing levels of CO 2 = increasing global temperature ("Global Warming") Damaging the ecosystems where photosynthesis occurs (i.e. the rainforests, the oceans) Reduces O 2 being produced Reduces CO 2 being removed

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Energy formed stored in bonds of ATP (adenine triphosphate)