Adventure and extreme sports vocabulary

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Across
  1. 3. Exploring deep underwater with a portable air tank.
  2. 4. Using a large kite to pull you across the water
  3. 6. Navigating a rough river in an inflatable boat.
  4. 8. Flying a light, non-motorized aircraft by shifting your weight.
Down
  1. 1. Swimming near the surface with a mask and a breathing tube.
  2. 2. Jumping from an airplane with a parachute
  3. 5. Riding a board on the face of a moving wave
  4. 7. Jumping from a high place attached to an elastic cord.