At each level of the food chain, about 90% of the energy is lost in the form of heat.   The total energy passed from one l...
<ul><li>The sun has one liter of rootbeer (energy) to give.  </li></ul><ul><li>2. Of that, the plant gets one-tenth or 100...
Sun has 1 liter (1000 ml) Plant receives -100 ml Plant has 100 ml Mouse receives 10 ml Mouse has 10 ml Hawk Receives 1 ml ...
Energy Pyramids  show the flow  of energy  through an ecosystem Ecologists  study  energy  pyramids
3 rd  level  consumers mostly carnivores & some omnivores 2 nd  level consumer carnivores & omnivores 1 st  level consumer...
10,000 Kcal 1000 Kcal 100 Kcal 10 Kcal 0.1% 1% 10% 100%  1 Kcal 0.01% When an owl eats a flying   squirrel it uses about 9...
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Energy flow presentation

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7th grade energy flow

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Energy flow presentation

  1. 1. At each level of the food chain, about 90% of the energy is lost in the form of heat. The total energy passed from one level to the next is only about one-tenth of the energy received from the previous organism. Therefore, as you move up the food chain, there is less energy available.
  2. 2. <ul><li>The sun has one liter of rootbeer (energy) to give. </li></ul><ul><li>2. Of that, the plant gets one-tenth or 100 milliliters. </li></ul><ul><li>3. The mouse gets 10 milliliters from the plant. </li></ul><ul><li>4. The hawk gets 1 milliliter from the mouse. </li></ul><ul><li>5. When the hawk dies and is decomposed by the mushroom, the mushroom gets only one-tenth of a milliliter! </li></ul>Rootbeer Activity
  3. 3. Sun has 1 liter (1000 ml) Plant receives -100 ml Plant has 100 ml Mouse receives 10 ml Mouse has 10 ml Hawk Receives 1 ml Hawk dies has 1 ml Decomposers receive . 1 ml
  4. 4. Energy Pyramids show the flow of energy through an ecosystem Ecologists study energy pyramids
  5. 5. 3 rd level consumers mostly carnivores & some omnivores 2 nd level consumer carnivores & omnivores 1 st level consumer herbivores Producers: green plants make their own energy from sunlight 10,000 Kcal 1000 Kcal 100 Kcal 10 Kcal 1 Kcal An energy pyramid from the Andrews
  6. 6. 10,000 Kcal 1000 Kcal 100 Kcal 10 Kcal 0.1% 1% 10% 100% 1 Kcal 0.01% When an owl eats a flying squirrel it uses about 90% of the calories to live— move, digest, produce body heat, reproduce and escape from predators. When a frog eats a cricket or a cricket eats a plant, they use 90% of those calories to move, digest, produce body heat, reproduce and escape from predators.

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