soil crossword puzzle

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Across
  1. 2. the chemical element of atomic number 7
  2. 4. the chemical element of atomic number 16
  3. 5. the process of wearing or being worn by long exposure to the atmosphere.
  4. 6. a burrowing annelid worm that lives in the soil.
  5. 7. solid rock underlying loose deposits such as soil
  6. 10. the chemical element of atomic number 20, a soft gray metal.
  7. 12. the top layer of soil
  8. 13. the organic component of soil
Down
  1. 1. the upper layer of earth in which plants grow
  2. 3. conductivity the degree to which a specified material conducts electricity
  3. 4. quality how well soil does what we want it to do
  4. 7. density the mass of the many particles of the material divided by the total volume they occupy
  5. 8. a microorganism, especially a bacterium causing disease
  6. 9. the level of acid in substances such as water, soil, or wine.
  7. 11. water or other liquid diffused in a small quantity as vapor