science choice board extra credit

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Across
  1. 1. The unconsolidated mineral or organic material on the immediate surface of the Earth that serves as a natural medium for the growth of land plants.
  2. 5. tectonic plates that divide
  3. 6. tectonic plates that mush against each other
  4. 8. the original rock from which younger rock or soil is formed.
  5. 10. cycle is a continuous process by which rocks are created, changed from one form to another, destroyed, and then formed again.
  6. 11. molten rock ejected by volcanoes in the form of a liquid.
  7. 12. extremely hot liquid and semi-liquid rock located under Earth's surface.
  8. 13. tectonic plates that slide against
  9. 14. the extensive interval of time occupied by the geologic history of Earth
  10. 15. vibration generated by an earthquake, explosion, or similar energetic source and propagated within the Earth or along its surface.
Down
  1. 1. a distinct layer of soil, approximately parallel with the land surface, whose properties develop from the combined actions of living organisms and percolating water.
  2. 2. the breaking down or dissolving of rocks and minerals on the surface of the Earth
  3. 3. the careful maintenance and upkeep of a natural resource to prevent it from disappearing.
  4. 4. the extensive interval of time occupied by the geologic history of Earth
  5. 7. the original rock from which younger rock or soil is formed.
  6. 9. formed by solidification of magma.
  7. 16. the rock that is formed through intense heat and preser