science

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Across
  1. 2. used as a growing medium
  2. 4. composed of one or more materials
  3. 5. splitting along a smooth flat planes
  4. 8. the building block of minerals
  5. 9. the process of eroding
Down
  1. 1. undegone by pressureand heat
  2. 3. rock formed under the earths crust
  3. 6. an opening in earths crust
  4. 7. a fertile soil of clay