Food chains

• Food chain is the pathway by which energy flows through an ecosystem.
• Food chain


  A list of organisms in a habitat that shows their feeding relationship
• A simple definition of a food chain would be what eats what
• Food chain


  • Animal (bird) eats animal (worm)
• A diagram of a food chain shows the feeding relationships between organisms
• The sun provides most of the energy that drives life on Earth, but it cannot be used directly by living things because plants are able to convert sunlight into chemical energy (photosynthesis).
• A food web shows all possible feeding relationships between organisms within an ecosystem.
• Energy flow diagrams show how much energy passes from one trophic level to another, as well as losses due to respiration.
• The pyramid of numbers represents the number of individuals at different levels of the food chain.