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7 7 Presentation Transcript

  •  The humus is the decayed material in soil
  •  A nonliving substance in the form of a crystal which is taken from the earth
  •  A scientist who studies the earth
  •  A substance with smooth flat surfaces that meet in sharp edges and corners.
  •  A rare valuable mineral
  •  The upper layer of soil
  •  The soil beneath the layer of topsoil
  •  The layer of rock below the subsoil part of the earths crust
  •  A solid layer of rock beneath the soil
  •  The layer of earth beneath the crust
  •  Hot, liquid rock within the earth