Earth History

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Across
  1. 2. a mix of humus, sand, silt, clay, gravel, and/or pebbles
  2. 3. the rock that forms earth’s crust
  3. 6. dropping off sediments at their final location
  4. 7. grinding and bumping of rocks
  5. 9. the breaking down of sediments or rocks
  6. 12. a rock that forms when layers of sediments get stuck together
  7. 13. plants that grow in between rocks until they break apart
  8. 14. using pressure to decrease the size and number of spaces between particles (to create sedimentary rocks like sandstone)
  9. 15. when nitrogen and sulfur dissolves in raindrops
Down
  1. 1. showing many layers or horizons of soil
  2. 4. moving or pushing sediments by water or wind
  3. 5. water getting into cracks, which freezes and expands to break apart rocks
  4. 8. the material that holds particles together to make stone
  5. 10. bits of dead plant and animal parts in soil
  6. 11. water stored below earth’s surface