Getting Dirt on Soil

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Across
  1. 4. things that do not come from an animal or plant
  2. 5. surface soil usually including the rich upper layer in which plants have most of their roots and which the farmer turns over in plowing
  3. 6. layer of solid rock immediately beneath the surface soil in geology found on terrestrial planets such as Earth
  4. 7. a layer of weathered material that lies just under the surface soil
Down
  1. 1. a brown or black product of partial decay of plant or animal matter that forms the organic portion of soil
  2. 2. a solid sediment that is similar to dust
  3. 3. chemical substances found in every living thing on Earth