What Makes Waves?

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Across
  1. 3. curious
  2. 5. middle
  3. 7. shell of a sea animal
  4. 9. large area of salt water
Down
  1. 1. at last
  2. 2. land near water
  3. 3. move your hand back and forth
  4. 4. something you think of
  5. 6. very small
  6. 8. neat pile