food chains and predator-prey cycles

• What should you be able to do by the end of the video on food chains?

  Use food chains to represent feeding relationships and describe predator-prey changes.
• What do both food chains in the video start with?

  They both begin with a green plant, called a producer.
• Who are the primary consumers in the food chains discussed?

  The rabbit in the first food chain and the caterpillar in the second food chain.
• What are secondary consumers?

  Animals that eat primary consumers.
• In the food chain with four stages, who is the tertiary consumer?

  The bird of prey.
• In the first food chain, who is the prey?

  The rabbit.
• What happens to the rabbit population during a warm summer?

  The rabbit population increases due to more food availability.
• In the second food chain, who is the predator?

  The bird.
• What happens when the fox population increases?

  The rabbit population decreases as more rabbits are eaten.
• What occurs after the rabbit population increases?

  The fox population also increases due to more food supply.
• What can disrupt predator-prey cycles?

  Changes in the community, such as drought or new predators.
• What are the key components of food chains and predator-prey cycles?

  • Producers: Green plants that synthesize biomass.
  • Primary consumers: Organisms that eat producers.
  • Secondary consumers: Organisms that eat primary consumers.
  • Tertiary consumers: Organisms that eat secondary consumers.
  • Predators: Consumers that kill and eat other animals.
  • Prey: Animals that are eaten by predators.