Kuljeet- 9-11-18 Crossword

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Across
  1. 2. A person who specializes in writing and serves as a record keeper
  2. 3. A sharpened reed used to press markings into clay tablets
  3. 4. floor spreading The process by which molten material adds new crust below Earth’s bodies of waters.
  4. 5. A deep undersea valley where crust sinks towards the mantle
  5. 8. The process by which crust sinks back into the mantle at a colliding plate boundary.
  6. 9. A mixture of copper and tin used to make stronger tools
Down
  1. 1. A picture or drawing that represents a word or idea
  2. 4. A device that reflects sound waves off underwater objects and records the echoes.
  3. 6. A type of writing made up of wedge-shaped markings
  4. 7. ocean ridge An undersea chain of mountains that is part of a long system of underwater mountains.