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Photosynthesis

Photosynthesis. STANDARD. Usable energy is captured from sunlight by chloroplasts, and stored through the synthesis of sugar from carbon dioxide. What is energy?. The ability to do work. Why do living things need energy? Movement Growth Repair Reproduction.

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Photosynthesis

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  1. Photosynthesis

  2. STANDARD • Usable energy is captured from sunlight by chloroplasts, and stored through the synthesis of sugar from carbon dioxide.

  3. What is energy? • The ability to do work • Why do living things need energy? Movement Growth Repair Reproduction

  4. Autotrophs – (self-feeding)Organisms that have the ability to make their own food. They use light energy from the sun to make food

  5. Photosynthesis Photo – lightSynthesis – to put together The process of converting carbon dioxide and water into glucose using the sun’s energy.

  6. The First QuestionWhen a tree grows, where does the added mass come from?1643 – Van HelmontFrom the soil????

  7. Photosynthesis 6CO2 + 6H2O  C6H12O6 + 6O2 energy chlorophyll Carbon dioxide water glucose oxygen reactants Products

  8. Stroma Outer Membrane Thylakoid Granum Inner Membrane Chloroplast • Organelle where photosynthesis takes place.

  9. Thylakoid Membrane Thylakoid Space Granum Thylakoid

  10. Why are plants green? • They contain a light absorbing molecule called a pigment. • The main pigment is chlorophyll • Plants are green because green light is reflected by chlorophyll

  11. Plant Pigments

  12. Steps of Photosynthesis • Two main steps (reactions). 1. Light Reaction or Light Dependent Reaction • Produces energy from the sun by splitting a water molecule

  13. Occurs in the Thylakoid membranes Thylakoid Membrane

  14. When water is split • Oxygen gas is formed - O2 • Hydrogen makes energy - ATP

  15. Steps of Photosynthesis 2. Light Independent Reaction Uses energy from light reaction (ATP) and CO2to make sugar (glucose).

  16. Stroma – Dark Reaction Thylakoid – Light Reaction Granum Chloroplast • Occurs in Stroma.

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