Story (4th): "Getting the Dirt On Soil"

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Across
  1. 1. group of microscopic organisms that are important to humans because of their chemical activities & as causes of disease
  2. 3. the rich upper layer of soil in which plants have most of their roots
  3. 5. a substance that is needed for healthy growth, development & functioning
  4. 6. the solid rock found under surface materials (as soil)
  5. 9. a layer of soil lying just under the topsoil
Down
  1. 2. a usable supply of something
  2. 4. naturally occurring substance (as ore, coal, salt or petroleum) obtained from the ground for human use
  3. 7. the dark rich part of the earth formed from decaying plant/animal material
  4. 8. particles of small size left as sediment from water