Allie's Crossword 9-11-18

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