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Photosynthesis

Photosynthesis. Photosynthesis. photo syn thesis photo = __________ syn = __________ thesis = __________ Process by which autotrophs convert sunlight into sugars. Auto = __________ Troph = __________. light. together. put. self. feed. What Are Autotrophs ?.

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Photosynthesis

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  1. Photosynthesis

  2. Photosynthesis photo syn thesis • photo = __________ • syn = __________ • thesis = __________ • Process by which autotrophs convert sunlight into sugars. • Auto = __________ • Troph = __________ light together put self feed

  3. What Are Autotrophs?

  4. Why do we depend on plants? • They make food! • We CANNOT make our own food  • Thankfully, plants produce glucose -- a food source for all heterotrophs! • hetero = __________ • troph = __________ different, other feed

  5. What Are Heterotrophs?

  6. How We See Color • Sunlight is made up of ALL colors together (wavelengths). • Pigmentsreflect the wavelength of color that we see and absorb the other colors.

  7. Why are plants green? • Chlorophyll is a pigmentfound in the chloroplasts of plant cells. • Chlorophyll A is the most important pigment in plants – responsible for the green color. • It reflects green and absorbs other wavelengths. • That means chlorophyll absorbs a lot more light than it reflects, which is a good thing!

  8. Why do leaves change color in the fall? • Why use just one wavelength of light when you can have more? • Accessorypigments absorb green and reflect other colors (e.g., red, yellow, or orange) • In autumn, leaves stop producing new chlorophyll A, which lets the accessory pigments show through

  9. Photosynthesis • Photosynthesis harnesses the sun’s energy and stores it as chemical energy in carbohydrates. • Takes place in chloroplasts. • Light energy (wavelengths) are absorbed by the pigment chlorophyll.

  10. Photosynthetic Organisms(Autotrophs) http://www.hawaii.edu/reefalgae/invasive_algae/chloro/clad_field_good_small.jpg http://www.wssa.net/photo&info/bmp/lupine.large-leaved.plants.jpg http://english.pravda.ru/img/2005/11/bacteria.jpg http://protist.i.hosei.ac.jp/GIFs/protists.jpg

  11. Organisms that Can Photosynthesize • Plants • Algae • Some protists • Some bacteria

  12. Photosynthesis Equation Energy + 6H2O + 6CO2 C6H12O6 + 6O2 Sunlight + Water + Carbon Dioxide Glucose + Oxygen

  13. How Plants Store Energy • When chlorophyll absorbs light, it splits water into hydrogen and oxygen, and puts electrons into an excited state (they have extra energy) • As the electrons leave the excited state, they release energy and heat • The cell converts the energy into ATP and NADPH for storage

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