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Ppt Ecology Energy Pyramid
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Transcript of Ppt Ecology Energy Pyramid
Warmup QuestionsWhat 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? ?
Prickly Pear CactusProducer
WoodratFirst-level Consumer
WeaselSecond-level Consumer
BobcatThird-level Consumer
Energy PyramidsAn 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?
Model Energy pyramidWe will make an energy pyramid as a class. Each row is another level of the pyramid.
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
1st level or Primary ConsumersEach 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 1st level consumers can our ecosystem hold?4 Half the energy half the organisms.
Why is there less energy?
2nd level consumersEach 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?
3rd level Each 3rd 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?
What is happening to energy?
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 4th level consumers?
Why is it unlikely to have 4th level consumers?
Why is it even more unlikely to have a 5th and 6th level?
Summary Questions
1. What does an energy pyramid represent? Why is it the pyramid shape?
2. Where does the energy of a food chain come from?3. What happens to energy as it gets passed down a
food chain?4. Why can there only be around 4 levels in an energy
pyramid?5. 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.
SummaryDraw 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.
Summary Questions
ActivityEnergy PyramidsProducerI 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____
ConsumerI 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 ______________
SummarizingWrite “The Story of Energy”
You are energy what is your life like in the food chain?