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Across
  1. 2. Solid rock beneath the earth's surface.
  2. 3. Rich, fertile soil containing a relatively equal mixture of sand and silt and a somewhat smaller proportion of clay.
  3. 4. A natural, earthy material known for its plasticity when wet.
  4. 6. Material deposited by water, wind, or glaciers.
  5. 8. The top layer of the earth's surface, where plants grow.
  6. 9. A loose aggregation of small water-worn or pounded stones.
Down
  1. 1. The ability of a material to allow fluids to pass through it.
  2. 5. A loose granular substance resulting from the erosion of rocks.
  3. 7. A brown, soil-like material characteristic of boggy, acid ground.
  4. 8. Fine sand, clay, or other material carried by running water and deposited as sediment.