Oceanography - Crossword puzzle 4

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Across
  1. 1. Hollywood director becomes the first person to perform a solo dive to the bottom of the Mariana Trench, the deepest point in the ocean.
  2. 3. Scalding hot water pouring from these vents enriches the water with nutrients and provides food for bacteria and a host of other organisms. This discovery rocks the scientific community because, for the first time, an ecosystem has been found that thrives without the energy of the Sun.
  3. 6. American geologist Marie Tharp discovers a rift valley extending over 40,000 nautical miles (64,373 kilometres) along the ocean floor. This discovery provides evidence for the newly formed theory of __________ drift, known today as plate tectonics.
Down
  1. 2. This trench is so deep that if you could put Mount Everest on the ocean floor, its summit would lie about a mile below the ocean surface.
  2. 4. Dr. Robert Ballard, with the help of a tiny robotic submarine named _____, discovers the wreck of the Titanic.
  3. 5. A Japanese expedition and film crew captures the first video of a live giant _____ in its natural environment.