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The Sun

The Sun. the ultimate source of all energy for all life on Earth. Autotrophs Vs. Heterotrophs. An autotroph is an organism that feeds itself! (produces its own food!) A heterotroph is an organism that feeds on another organism (cannot produce own food!)

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The Sun

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  1. The Sun the ultimate source of all energy for all life on Earth

  2. Autotrophs Vs. Heterotrophs An autotroph is an organism that feeds itself! (produces its own food!) A heterotroph is an organism that feeds on another organism (cannot produce own food!) Can you think of an example of each? Poison Sumac Lions (and Zebras for that matter!)

  3. Autotroph or Heterotroph?

  4. Autotroph or Heterotroph?

  5. Autotroph or Heterotroph?

  6. Autotroph or Heterotroph?

  7. Make two lists Make one list of autotrophs and another list of heterotrophs

  8. Test Results! • Make your own Mastery bar graph (just like we did last quarter) • If you earned below an 80% you should come to restudy and retake that objective.

  9. Diffusion/Osmosis Exam

  10. Objective 1: types of diffusion 5 points • Objective 2: demonstrate understanding of diffusion 12 points • Objective 3: demonstrate understanding of osmosis 15 points

  11. Objective 1: types of diffusion 5 points • Objective 2: demonstrate understanding of diffusion 12 points • Objective 3: demonstrate understanding of osmosis 15 points

  12. Put tests into your folder in the test crate! • They are alphabetical by last name.

  13. Autotroph vs. Heterotroph Game • You and your chat chum need: • 1 red pen/marker/colored pencil • 1 green pen/marker/colored pencil • 1 game sheet • Pick a color • Green circles autotrophs • Red circles heterotrophs

  14. http://www.youtube.com/watch?v=3RE7uC8QXjY • When you can no longer hear the music you need to stop!

  15. Cell Energetics Reminder: ALL CELLS NEED ENERGY Autotrophs: energy from Light, through photosynthesis Heterotrophs: use Cellular Respiration for energy

  16. Cell Energy: • Cells usable source of energy is called ATP • ATP stands for adenosine triphosphate • ATP is a chemical! Adenine Ribose 3 Phosphate groups

  17. Plants are Photoautotrophs Photo = Light Auto = Self Troph = Feed Plants are “photoautotrophs” because they feed themselves with light.

  18. PHOTOSYNTHESIS …is the conversion of light energy into chemical energy by living organisms Prickly Pear Cactus Cedar Tree

  19. Photosynthesis: • Photosynthesis is the process by which the energy of sunlight is converted into the energy of glucose

  20. General formula for photosynthesis: carbon dioxide + water + light glucose + oxygen 6CO2 + 6H2O + light C6H12O6 + 6O2

  21. Where does Photosynthesis happen? In Chloroplasts!

  22. What’s in a Chloroplast? Photosynthesis takes place within the thylakoid membranes!

  23. Light absorbing compound is a pigment—pigments absorb some wavelengths of light and reflect others—the color our eyes see is the color that the pigment reflects This is why plants are green!

  24. Light and Pigments • Plants absorb light in different wave lengths • Pigments • Light absorbing molecules • Chlorophyll • Pigment in plants that absorb light in the blue region and red region. Located in the chloroplast • Green gets reflected

  25. Why doesn’t chlorophyll absorb green light well? This is why Chloroplast (and plants in general) are green!

  26. Chlorophyll is the pigment inside the chloroplast the absorbs light for photosynthesis As the chlorophyll in leaves decays in the autumn, the green color fades and is replaced by the oranges and reds of carotenoids.

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