food chains

• • food chains start with a producer
  • a producer is a green plant or algae who make glucose by photosynthesis
  • green plants produce glucose to make biologica molecules
  • biological molecules are the biomass of the plant - the mass of living material
• • biomass can be thought of as energy stored in a plant
  • energy is transferred in an ecosystem when organisms eat other organisms
• • producers are eaten by primary consumers
  • primary consumers are eaten by secondary consumers
  • secondary consumers are eaten by tertiary consumers
• • in a stable community, the number of predators and prey rise and fall in cycles