Energy in ecosystems

• What do the arrows represent in a food chain

  Direction of energy flow
• Name 3 ways in which energy can be lost from a food chain/web

  Heat, movement, undigested materials
• What is a pyramid of numbers?

  Shows the relative number of each organism at each level of a food chain
• Why might a pyramid of numbers have an odd shape

  Because there may be a large producer supporting many small consumers
• What is a pyramid of energy?

  Shows the energy avaliable at each level of the food chain