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Ppt Ecology Energy Pyramid
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Ppt Ecology Energy Pyramid

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  • 1. Warmup Questions What does an energy pyramid represent? Why is it the pyramid shape? Where does the energy of a food chain come from?   What happens to energy as it gets passed down a food chain?   ?
  • 2. Prickly Pear Cactus Producer Woodrat First-level Consumer Weasel Second-level Consumer Bobcat Third-level Consumer
  • 3. Energy Pyramids
    • An energy pyramid is a diagram that shows how much energy is at each step of the food chain.
    • A 3d food chain.
    • Shows how many organisms at each step of food chain
    • Where are there more
    • organisms?Why?
  • 4. Model Energy pyramid
    • We will make an energy pyramid as a class.
    • Each row is another level of the pyramid.
  • 5. Producers.
    • I have 8 producers. Each one of you makes food holding 2 Units of energy.
      • Where do you get the energy to make the food?
      • What chemical do you make that stores the energy?
    • What will the producers do with that energy?
      • Use it to grow,
      • Use it to live.
      • It will burn off in these processes
  • 6. 1 st level or Primary Consumers
    • Each primary consumer also needs 2 units of energy to survive.
    • How much energy does our ecosystem have left?
      • 8 units/ Half of the original 16.
    • How many 1 st level consumers can our ecosystem hold?
      • 4 Half the energy half the organisms.
    • Why is there less energy?
  • 7. 2 nd level consumers
    • Each primary consumer also needs 2 units of energy to survive.
    • How much energy does our ecosystem have left?
      • 4units/ Half of the original 8
    • How many 2nd level consumers can our ecosystem hold?
      • 2 Half the energy half the organisms.
    • Why is there less energy? Where did it go?
  • 8. 3 rd level
    • Each 3 rd level consumer also needs 2 units of energy to survive.
    • How much energy does our ecosystem have left?
      • 2 units/ Half of the previous 4.
    • How many 3rd level consumers can our ecosystem hold?
      • 1 Half the energy half the organisms.
    • Why is there less energy?
  • 9.  
  • 10. What is happening to energy?
  • 11. How big can the pyramid get?
    • Why is the third level consumer usually the top of the food chain?
    • Do you think its common to have 4 th level consumers?
    • Why is it unlikely to have 4 th level consumers?
    • Why is it even more unlikely to have a 5 th and 6 th level?
  • 12. Summary Questions
    • What does an energy pyramid represent? Why is it the pyramid shape?
    • Where does the energy of a food chain come from?
    • What happens to energy as it gets passed down a food chain?
    • Why can there only be around 4 levels in an energy pyramid?
    • What is one organism that’s important to a food chain that’s not shown on an energy pyramid?
    Answer on a sheet of paper.
  • 13. Summary
    • Draw an energy Pyramid
    • First make a food chain.
    • Turn your food chain into an energy pyramid.
      • Show how many organisms would be at each level.
      • Explain what is happening to the energy at each level.
      • Show how nutrients can go from the third level consumers back to the producers.
  • 14. Summary Questions
  • 15. Activity
    • Energy Pyramids
    Producer I am a ___Algae_______ I am the___Producer____ My energy role is a_______Producer_______ . I get my energy from the___SUN__________ I use energy to_function_________ I use nutrients for___Building Cells________ I get eaten by the___Plankton_________ I give it ___Energy_______ and __Nutrients____ Consumer I am a _____1_______ I am the____First level___2__________ My energy role is a__Consumer/Herbivore____________ . I get my   energy from the_____________ I use energy to____________ I use nutrients for___________ I get   eaten by the____________ I give it __________ and ______________
  • 16. Summarizing
    • Write “The Story of Energy”
    • You are energy what is your life like in the food chain?