Ocean Food Chains · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

The Ocean Food Chain

Science · Ocean Life · ages 5-7
Name ______________________   Date ____________

  1. Which of these is a real food chain?

    • A shark and a big fish
    • A rock and sand
    • Tiny plants and a small fish

  2. What do ocean food chains start with?

    • A shark
    • Tiny plants
    • A rock

  3. Bigger fish eat smaller fish in the ocean.

    Circle one:   True   False

  4. Which of these could start an ocean food chain?

    • A dolphin
    • A crab
    • Phytoplankton

  5. Look at the chain. What comes right after small fish?

    tiny plantssmall fishbig fishshark
    • Big fish
    • Tiny plants
    • Shark

  6. Count the levels in this food chain. Type the number.

    tiny plantssmall fishbig fishshark

    Answer: ______________

  7. Mia says a food chain can just be a fish and a shark. Is she right?

    • No, it needs tiny plants too
    • Yes, that is enough
    • No, it needs four sharks

  8. If all the small fish disappeared, what would happen to the big fish?

    • They would have more food
    • They would have less food
    • Nothing would change
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Answer key

For grown-ups. Fold this page away before handing over the rest.

The Ocean Food Chain W1-mt_l6OpmOKMuT-s1

  1. Tiny plants and a small fish · Tiny plants and a small fish make a real chain: the small fish eats the tiny plants. The other pairs skip the plants or are not food at all.
  2. Tiny plants · Tiny ocean plants called phytoplankton start the chain. Sharks come at the very end.
  3. True · Yes. Big fish eat smaller fish to get their food.
  4. Phytoplankton · Only tiny plants like phytoplankton can start a chain. Animals need something to eat first.
  5. Big fish · After small fish comes big fish. The shark eats the big fish next.
  6. 4 · Tiny plants, small fish, big fish, and shark: that is four levels.
  7. No, it needs tiny plants too · A real food chain always starts with tiny plants, not just two animals.
  8. They would have less food · Big fish eat small fish, so losing them means less food for big fish.
Worksheet · LightMySky