Science.

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Across
  1. 3. height: the distance between the crest and trough
  2. 5. the highest part of a wave
  3. 7. the lowest part of a wave, between crests
  4. 8. in a body of water, a wave that breaks or collapses into foam when it reaches shallow water or a beach.
  5. 9. an area of land that sticks out into a body of water
Down
  1. 1. In a body of water , a large ripple set in motion by steady winds; also, the way in which light travels.
  2. 2. a part of a body of water that reaches into the land.
  3. 4. The process of which natural forces such as wind, water, or ice move soil or rocks from one place to another.
  4. 6. In the ocean, a long, smooth wave near the shore; caused by winds and storms far out at sea.