Worksheet

Food Chains and Ecosystems

Grade 3 - Science - Building Confidence

NameDate

  1. Which food chain is correctly ordered for a forest?

    • leaves -> caterpillar -> bird
    • caterpillar -> leaves -> bird
    • leaves -> bird -> caterpillar
    • bird -> caterpillar -> leaves

  2. In this chain, which organism is the producer: leaves -> caterpillar -> bird?

    • leaves
    • caterpillar
    • bird
    • fungi

  3. What role does the mouse have in corn -> mouse -> owl?

    • predator
    • consumer
    • decomposer
    • producer

  4. What would most directly affect the penguin if the krill population disappeared?

    • energy flow would stay the same
    • less food would be available
    • more prey would be available
    • the predator would need no food

  5. Which organism helps break down dead material in the forest?

    • fungi
    • leaves
    • caterpillar
    • bird

  6. Which food chain is correctly ordered for a ocean?

    • phytoplankton -> penguin -> krill
    • krill -> phytoplankton -> penguin
    • penguin -> krill -> phytoplankton
    • phytoplankton -> krill -> penguin

  7. In this chain, which organism is the producer: corn -> mouse -> owl?

    • owl
    • mouse
    • worms
    • corn

  8. What role does the krill have in phytoplankton -> krill -> penguin?

    • consumer
    • predator
    • producer
    • decomposer

  9. What would most directly affect the owl if the mouse population disappeared?

    • less food would be available
    • the predator would need no food
    • energy flow would stay the same
    • more prey would be available

  10. Which organism helps break down dead material in the pond?

    • fish
    • algae
    • snail
    • bacteria
PencilGopencilgo.ai