Worksheet

Food Chains and Ecosystems

Grade 3 - Science - On Level

NameDate

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

    • snail -> algae -> fish
    • algae -> fish -> snail
    • algae -> snail -> fish
    • fish -> snail -> algae

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

    • worms
    • owl
    • corn
    • mouse

  3. What role does the caterpillar have in leaves -> caterpillar -> bird?

    • producer
    • consumer
    • decomposer
    • predator

  4. What would most directly affect the hawk if the rabbit population disappeared?

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

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

    • wolf
    • mushrooms
    • deer
    • berry bush

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

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

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

    • leaves
    • caterpillar
    • fungi
    • bird

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

    • consumer
    • predator
    • producer
    • decomposer

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

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

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

    • algae
    • snail
    • fish
    • bacteria
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