Food Chains & Energy Transfer · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.
به انگلیسی

Energy Along a Food Chain

Science · Ecosystems & Habitats · ages 8-9
Name ______________________   Date ____________

  1. Which living thing gets its food by eating other living things?

    • A patch of grass
    • An oak tree
    • A caterpillar

  2. An oak tree uses sunlight to make food. Caterpillars eat its leaves. Where does the energy entering this chain come from?

    • The soil
    • The caterpillars
    • The sun

  3. Read this chain from food to eater: Grass, Rabbit, Fox. What does the rabbit eat in this chain?

    GrassRabbitFox
    • The grass
    • The fox
    • Its own body

  4. Algae use sunlight to make food. Tadpoles eat the algae, fish eat the tadpoles, and a heron eats the fish. Which organism is the producer?

    • Heron
    • Algae
    • Tadpole

  5. Read this chain from food to eater: Grass, Grasshopper, Frog, Snake. Which organism is the primary consumer?

    • Grasshopper
    • Meadow snake
    • Meadow grass

  6. A robin eats a caterpillar. How much of the energy in its food becomes stored in the robin's body?

    • Only some becomes stored in the robin
    • None can pass from food to the robin
    • All stays stored forever in the robin

  7. How many consumers are in this chain: Oak tree, Caterpillar, Robin, Hawk?

    Answer: ______________

  8. A robin hunts a caterpillar for food. In this link, the caterpillar is the robin's...

    • predator
    • producer
    • prey

  9. Amara says strong hunters must have more energy available to their feeding level than producers do. Which response follows the energy-transfer rule?

    • Stronger hunters create energy that producers cannot supply
    • Later feeding levels have less energy available to support them
    • Producers have no energy available for consumers to receive

  10. Drought kills most grass in this model: Grass, Grasshopper, Frog, Snake. If food becomes scarce along the chain and no other foods replace it, what could happen to snakes?

    • Snakes could gain food as grasshoppers become scarce
    • Snakes could make food from sunlight like the grass
    • Snakes could lose food as fewer frogs are supported
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Answer key

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

Energy Along a Food Chain W1-mt_oB-L8EVdIP-s1

  1. A caterpillar · The caterpillar eats leaves, so it is a consumer.
  2. The sun · The oak tree captures energy from sunlight.
  3. The grass · Grass is the food listed just before the rabbit.
  4. Algae · The algae make their own food, so they are the producer.
  5. Grasshopper · The grasshopper eats the producer, grass, so it is the primary consumer.
  6. Only some becomes stored in the robin · Only some is stored. The robin uses energy and releases heat; some food is not digested.
  7. 3 · Caterpillar, robin and hawk obtain food by eating. There are 3 consumers.
  8. prey · The caterpillar is the animal being hunted, so it is prey for the robin.
  9. Later feeding levels have less energy available to support them · Only some energy passes to each later feeding level. Hunting strength does not reverse that pattern.
  10. Snakes could lose food as fewer frogs are supported · Less grass can support fewer grasshoppers, then fewer frogs for snakes to eat.
Worksheet · LightMySky