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CLIP 201

Food chains - pyramid of numbers

Food chains - pyramid of numbers
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Key Info
  • Food chains - pyramid of numbers
  • Duration: 01:16
  • A pyramid of numbers is explained in terms of a food chain. The presenter looks at a food chain in which about ten percent of the energy of each level is passed on to the next higher level. For example, one fox must eat seventy rabbits per year to survive, and each rabbit must consume 20,000 blades of grass. This is what is known as a pyramid of numbers.
  • Subject:

    Science

       Topic:

    Bio: Energy

  • Keywords: energy, interdependence, ecosystem, pyramid of numbers, food chain
Ideas for use in class
  • Use this clip to introduce a pyramid of numbers.
Background details
  • Clip language : English
  • Aspect ratio : 4x3

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