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Across 1. ___ Zone: The area of the ocean that extends from the low tide line out to the edge of the continental shelf. 4. Occurs when the difference between the high and low tides is greatest. Happens when the Sun, Earth, and Moon are aligned during the full or new moon. 8. An underwater vehicle built of strong materials to resist pressure. 9. A steep incline of the ocean floor leading down from the edge of the continental shelf. 11. A gently sloping, shallow area of the ocean floor that extends outward from the edge of a continent. 13. A wall made of rocks or concrete that is built outward from a beach to reduce erosion. 16. The vertical distance from the crest to the trough of a wave. 18. The horizontal distance between the crest of one wave and the crest of the next wave. 19. A deep, steep-sided canyon in the ocean floor.

Down 1. Occurs when the distance between the high and low tides is the least. Happens when the Sun, Earth, and Moon are at right angles to each other during the first and third quarters of the moon. 2. The daily rise and fall of Earth's waters on its coastlines. 3. A rush of water that flows rapidly back to sea through a narrow opening in a sandbar. 5. A large stream of moving water that flow through the oceans. 6. A smooth, nearly flat region of the deep ocean floor. 7. The effect of Earth's rotation on the direction of winds and currents. 8. The total amount of dissolved salts in a water sample. 10. ___ Zone: The deepest, darkest area of the ocean beyond the edge of the continental shelf 12. ___ Zone: An area that stretches from the highest high tide line out to the point on the continental shelf exposed by the lowest tide. 14. The number of waves that pass a specific point in a given amount of time. 15. The movement of cold water upward from the deep ocean that is caused by wind. 17. The movement of energy through a body of water.