The Earthworms and Soil Health Quiz
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Questions and Answers

Which of the following best describes the role of earthworms in soil health?

  • Earthworms create topsoil by ingesting particles of soil and expelling nutrient-rich casts.
  • Earthworms release oxygen into the soil through their respiration.
  • Earthworms protect the soil from erosion by burrowing deep into the ground.
  • Earthworms help to break down organic matter in the soil. (correct)

    • What percentage of the earth's surface provides the soil we rely on for agriculture?

  • 20 percent
  • 50 percent
  • 7.5 percent (correct)
  • 95 percent

    • What is the main threat to topsoil?

  • Overuse of chemical fertilizers
  • Erosion caused by wind and water (correct)
  • Proliferation of harmful bacteria
  • Lack of organic matter in the soil

    • What percentage of our food is grown using topsoil?

    <p>95 percent</p> Signup and view all the answers

    How long does it take to create an inch of fertile topsoil?

    <p>Thousands of years</p> Signup and view all the answers

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