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Ocean Voyage

Answer Key

  1. About 71 percent of Earth is covered by water.
  2. Giant kelp is the world's fastest-growing plant.
  3. The average temperature of ocean water is 3.5 degrees Celsius (38 degrees Fahrenheit).
  4. About 10 percent of Earth is covered by ice.
  5. Microscopic plankton are the smallest ocean creatures.

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