9th grade Energy pyramids: how much energy reaches each level worksheet

Energy pyramids: how much energy reaches each level

Grade 9 Science Worksheet - Building Confidence

Circle the best answer.

1. 1.

   Energy pyramid (model data), not to scale, 3 steps from the bottom. Ari reads a model energy pyramid. Step W, the bottom step, holds grass. Which level is step W?

   • Secondary consumers
   • Producers
   • Primary consumers
   • Decomposers
2. 2.

   not to scale. Bo reads a pyramid. Energy passes from the grass to the grasshoppers on step X. Which level is step X?

   • Decomposers
   • Producers
   • Primary consumers
   • Secondary consumers
3. 3.

   Energy pyramid (model data), not to scale, 4 steps from the bottom. Unit: kJ. Esme reads a four-step pyramid. Step Y is the third step from the bottom. Which level is step Y?

   • Secondary consumers
   • Primary consumers, the second level
   • Producers, the base level
   • Tertiary consumers, the top level
4. 4.

   2 steps from the bottom. Jun reads a model pyramid. About 10 percent of the producers' energy passes up one step. What goes in the blank?

   • 100 kJ
   • 10,000 kJ
   • 1,000 kJ
   • 9,000 kJ
5. 5.

   Kira reads a model pyramid. The producers hold 10,000 kJ and the primary consumers hold 1,000 kJ. What percent passes up?

   • 100 percent
   • 1 percent
   • 10 percent
   • 90 percent
6. 6.

   Milo wants the word for any step in a food chain, from the producers up. Which word fits?

   • Apex consumer
   • Producer
   • Trophic level
   • Decomposer
7. 7.

   Noah is learning the term food chain. Which description fits it best?

   • A circle in which energy returns to the producers
   • Many paths joined together into one web
   • A stack of bars that shows the energy at each level
   • A single path along which energy and nutrients pass from one organism to the next
8. 8.

   Pia reads about decomposers in a food web. Which sentence describes their job?

   • They return energy to the producers to be used again
   • They break down wastes and remains and return matter to the ecosystem
   • They form the top level and hold the most energy
   • They make their own food from sunlight
9. 9.

   Energy passes to the next step up, and some is used for life or lost as heat at each step. Tala traces how energy moves through the pyramid. Which description is right?

   • One way, down from the top step to the producers
   • Around in a circle, from the top step back to the producers
   • Up the steps, but destroyed at each step, so nothing arrives
   • One way, up from the producers, with some lost as heat at each step

10. Read this first

    Use this

    Energy pyramid (model data), not to scale, 4 steps from the bottom. Unit: kJ. Bottom step: producers (grass), 10,000 kJ. Second step: primary consumers (grasshoppers), 1,000 kJ. Third step: secondary consumers, 100 kJ. Top step: tertiary consumers, 10 kJ.

11. 10.

    Zee reads a model pyramid of energy. Which level holds the most energy?

    • Tertiary consumers
    • Primary consumers
    • The four levels hold equal amounts
    • Producers