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Grade 7 Energy Pyramids (10% Rule) Worksheet with Answers

Grade 7 (US) · Year 8 (UK) · Class 7 (India) · Science

Unit 2: EcosystemsRoles & Food WebsNGSS MS-LS2-3

How only about 10% of energy passes to each level of a food chain. This free middle school worksheet has 16 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Energy Pyramids (10% Rule)

Grade 7 · Science

Score___ / 16

Name

Class

Date

Learning goal: Roles & Food Webs · NGSS MS-LS2-3

Directions: This worksheet has 2 parts. Read the instructions at the start of each part.

Example

About what percent of energy passes from one level of an energy pyramid to the next?

Answer: about 10%

Part A

Label the diagram. Use the words in the box.

Word bank

secondary consumersprimary consumersproducerstertiary consumers
grassgrasshopperfroghawkless energy1234
  1. 1
  2. 2
  3. 3
  4. 4
Part B

Answer each question. Use full sentences where you can.

  1. 5

    Producers have 10,000 kJ of energy. About how much reaches the primary consumers?

    10,000 kJproducers?primary consumerssecondary consumersabout 10% passes up
  2. 6

    Producers have 100,000 kJ of energy. About how much reaches the secondary consumers?

    100,000 kJproducersprimary consumers?secondary consumersabout 10% passes up
  3. 7

    Producers have 2,000 kJ of energy. About how much reaches the primary consumers?

    2,000 kJproducers?primary consumerssecondary consumersabout 10% passes up
  4. 8

    Producers have 20,000 kJ of energy. About how much reaches the primary consumers?

    20,000 kJproducers?primary consumerssecondary consumersabout 10% passes up
  5. 9

    Producers have 1,000 kJ of energy. About how much reaches the primary consumers?

    1,000 kJproducers?primary consumerssecondary consumersabout 10% passes up
  6. 10

    Producers have 2,000 kJ of energy. About how much reaches the secondary consumers?

    2,000 kJproducersprimary consumers?secondary consumersabout 10% passes up
  7. 11

    Producers have 50,000 kJ of energy. About how much reaches the secondary consumers?

    50,000 kJproducersprimary consumers?secondary consumersabout 10% passes up
  8. 12

    Producers have 5,000 kJ of energy. About how much reaches the primary consumers?

    5,000 kJproducers?primary consumerssecondary consumersabout 10% passes up
  9. 13

    Producers have 20,000 kJ of energy. About how much reaches the secondary consumers?

    20,000 kJproducersprimary consumers?secondary consumersabout 10% passes up
  10. 14

    Producers have 5,000 kJ of energy. About how much reaches the secondary consumers?

    5,000 kJproducersprimary consumers?secondary consumersabout 10% passes up
  11. 15

    Producers have 50,000 kJ of energy. About how much reaches the primary consumers?

    50,000 kJproducers?primary consumerssecondary consumersabout 10% passes up
  12. 16

    Producers have 1,000 kJ of energy. About how much reaches the secondary consumers?

    1,000 kJproducersprimary consumers?secondary consumersabout 10% passes up

★ Challenge corner for fast finishers

Ice floats in water. What does that tell you about its density?

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/science/7/energy_pyramid

Answer key (click to show)
  1. 1.producers
  2. 2.primary consumers
  3. 3.secondary consumers
  4. 4.tertiary consumers
  5. 5.1,000 kJ
  6. 6.1,000 kJ
  7. 7.200 kJ
  8. 8.2,000 kJ
  9. 9.100 kJ
  10. 10.20 kJ
  11. 11.500 kJ
  12. 12.500 kJ
  13. 13.200 kJ
  14. 14.50 kJ
  15. 15.5,000 kJ
  16. 16.10 kJ
  17. ★ice is less dense than liquid water (challenge corner)

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