Section 2 Vocabulary

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Across
  1. 1. dark-colored substance that forms as plant and animal remains decay
  2. 3. the loose weathered material on Earth's surface in which plants can grow
  3. 5. a measure of how well the soil supports plant growth
  4. 7. soil that is made up of about equal parts of clay, sand, and silt
  5. 8. Horizon a layer of soil that differs in color and texture from the layers above or below it
  6. 9. the solid layer of rock beneath the soil
  7. 10. loose layer that forms when plants shed leaves
Down
  1. 2. a horizon that consists of clay and other particles washed down from the topsoil, but little humus
  2. 4. the organisms that break the remains of dead organisms into smaller pieces and digest them with chemicals
  3. 6. crumbly dark brown soil that is a mixture of humus, clay, and other minerals