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 Photosynthesis  Photosynthesis- A process by which plants convert sunlight, water, and carbon dioxide into food energy (sugar), oxygen and water.

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Presentation on theme: " Photosynthesis  Photosynthesis- A process by which plants convert sunlight, water, and carbon dioxide into food energy (sugar), oxygen and water."— Presentation transcript:

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3  Photosynthesis  Photosynthesis- A process by which plants convert sunlight, water, and carbon dioxide into food energy (sugar), oxygen and water.  Chloroplast  Chloroplast- An elongated cell organelle containing chlorophyll where photosynthesis takes place.  Chlorophyll  Chlorophyll- A green molecule which uses light energy from sunlight to change water and carbon dioxide gas into sugar and oxygen

4 H CO 2 + light  O 2 + glucose ReactantsProducts

5 Chlorophyll is the green pigment inside the chloroplasts of plant cells that makes leaves green!

6 CO 2

7 Sugar + O 2 O2O2O2O2

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10  Respiration  Respiration- The process by which the chemical energy of "food" molecules is released and changed into ATP.  Mitochondria  Mitochondria- Rod-shaped organelles with a double membrane which converts the energy stored in glucose into ATP for the cell.

11 O 2 + glucose  H CO 2 + ATP Reactants Products Do you notice something about this equation?

12  Animals use:  Sugar (from producers/plants)  Oxygen (from producers/plants)  Plants use:  Carbon dioxide (from animals)

13 O2O2 O2O2 O2O2 O2O2 O2O2

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15 Photosynthesis Equation: light H 2 O + CO 2 + light  O 2 + glucose Respiration Equation: ATP O 2 + glucose  H 2 O + CO 2 + ATP What about light & ATP?

16  The Law of Conservation of Energy says… 1.) Energy cannot be created 2.) Energy cannot be destroyed Therefore…energy can only be transformed into other types of energy.

17 In photosynthesis: Electromagnetic energy (sun)  Chemical Energy (sugar) In respiration: Chemical energy (sugar)  Different type of Chem. Energy (ATP)

18  ATP- Adenosine triphosphate  A high energy molecule that serves as the energy currency of the cell ATP We will visit ATP again in a few weeks during our CELL UNIT!


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