Food webs: where energy and matter go in an ecosystem

Grade 7 Science Worksheet - Building Confidence

Circle the best answer.

1. 1.

   Ari reads a pond web with one arrow, from pond algae to tadpoles. What does the arrow show?

   • Energy moves in a circle between the two organisms
   • The tadpoles live inside the pond algae
   • The tadpoles get energy from the pond algae
   • The pond algae get energy from the tadpoles
2. 2.

   Bo sees an arrow from fallen leaves to fungi on a forest floor. Which way does the energy move?

   • Nowhere; arrows show which box is bigger
   • From the fallen leaves to the fungi
   • Around and around, back to the leaves
   • From the fungi to the fallen leaves
3. 3.

   Luz reads a desert web: arrows run from desert shrub to beetles and from beetles to lizards. Which organism gets energy from the beetles?

   • No other organism
   • The desert shrub
   • The lizards
   • The sun
4. 4.

   In Esme's school garden web, an arrow runs from the sun to the bean plants. What role do the bean plants have?

   • Decomposer: it breaks down remains in the soil
   • Consumer: it gets energy from other organisms
   • Producer: it takes its food from the soil
   • Producer: it makes its own food using light
5. 5.

   In Tala's forest web, an arrow runs from oak seeds to mice. What role do the mice have?

   • Producer: it makes its own food from light
   • Producer: the arrow points to it, so it is the food
   • Decomposer: it breaks down wastes and remains
   • Consumer: it gets energy from another organism
6. 6.

   Jun's desert web has boxes for desert grass, grasshoppers and lizards, and one arrow from the grass to the grasshoppers. Which arrow is missing so energy reaches the lizards?

   • From the lizards to the desert grass
   • From the grasshoppers to the lizards
   • From the lizards to the sun
   • From the lizards back to the grasshoppers
7. 7.

   Zee studies a garden bed where fungi break down fallen leaves. Which missing arrow, labeled nutrients, shows matter returning to the soil?

   • From the fungi to the sun
   • No arrow is needed; the leaves just vanish
   • From the fungi to the soil
   • From the soil to the fungi
8. 8.

   Pia's pond web has an arrow from box B to the tadpoles. Box B is blank. Which word bank choice belongs in box B?

   • Bacteria in the mud
   • The sun
   • Pond algae
   • Frogs
9. 9.

   Forest floor web, not to scale. Boxes: moss (producer tag). Kira reads that moss on a forest floor is a producer. Which meaning matches the word producer?

   • It takes its food from the soil
   • It gets energy from other organisms
   • It breaks down wastes and remains
   • It makes its own food using light
10. 10.

    Noah draws arrows to join several food chains from a school garden. What is this joined drawing called?

    • A food chain
    • A food list
    • An energy loop
    • A food web