9-19-16

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Across
  1. 3. Good for growing crops.
  2. 6. The process by which molten materials adds new crust below Earth's bodies of water.
  3. 8. A deep undersea valley where the crust sinks towards the mantle.
  4. 9. A type of fabric woven from flax plants.
  5. 10. A tool used to spread water across fields.
Down
  1. 1. A waterfall.
  2. 2. The area near a river's mouth where the water deposits fine soil.
  3. 4. A device that reflects sound waves off underwater objects and records the echoes.
  4. 5. An undersea chain of mountains that is part of a long system of underwater mountains.
  5. 7. The process by which crust sinks back into the mantle at a colliding plate boundary.