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Grade 7 Natural Selection & Adaptation Worksheet with Answers

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

Unit 3: Heredity & EvolutionNatural SelectionNGSS MS-LS4-4

Variation, mutation and natural selection, and how populations change over generations. This free middle school worksheet has 11 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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Natural Selection & Adaptation

Grade 7 · Science

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Learning goal: Natural Selection · NGSS MS-LS4-4

Directions: Read each question carefully and write your answer on the line.

RememberNatural selection

Variationtraits differToo manyyoungnot all surviveCompetitionfood, spaceBest-suitedsurviveand reproduceTraitsspreadover generations
  1. 1

    Give an example of artificial selection.

  2. 2

    Darwin's finches had different beak shapes. Why?

  3. 3

    What is artificial selection?

  4. 4

    What is a mutation?

  5. 5

    Do individuals evolve during their lifetime?

  6. 6

    Peppered moths turned darker during the Industrial Revolution. Why?

  7. 7

    Who developed the theory of evolution by natural selection?

  8. 8

    What evidence supports evolution?

  9. 9

    What is natural selection?

  10. 10

    Why do bacteria become resistant to antibiotics?

  11. 11

    What is variation?

★ Challenge corner for fast finishers

A ball is thrown straight up. What is its speed at the very top?

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Teacher's comments

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

Answer key (click to show)
  1. 1.dog breeds or crop varieties (any one)
  2. 2.beaks adapted to different foods on different islands
  3. 3.humans breeding plants or animals for chosen traits
  4. 4.a change in DNA
  5. 5.no — populations evolve over generations
  6. 6.dark moths were better hidden on sooty trees and survived more
  7. 7.Charles Darwin
  8. 8.fossils, DNA similarities and similar body structures
  9. 9.individuals with helpful traits survive and reproduce more
  10. 10.resistant bacteria survive and pass on the trait
  11. 11.differences in traits among individuals of a species
  12. ★zero (for an instant) (challenge corner)

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