Energy in ecosystems

• what do food chains show?

  links between organisms feeding in an ecosystem
• What do arrows in a food chain show?

  the direction of energy transfer (where energy is travelling to)
• how is energy in ecosystems lost?

  heat, movement, undigested materials(waste)
• What is a small quantity of energy in food chains used for?

  growth
• What does a pyramid of numbers show you?

  the total number of organisms at each step in a food chain
• What does a pyramid of energy show?

  the total energy in all organisms at each stage of a food chain