Tourism and the Great Barrier Reef

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Across
  1. 2. A mineral used in glass making.
  2. 3. Tiny soft-bodied animals.
  3. 5. This underwater creatures population has increased dramatically over the years.
  4. 7. These have decreased due to shell-hunting tourists on the Great Barrier Reef.
  5. 9. The act to maintain (something) in its original or existing state.
  6. 10. These people spearfish along the reef.
  7. 11. This term can be used to describe why the reef is being stripped of its live coral and natural beauty.
  8. 12. This type of food provides the necessary nutrition to the coral polyps.
  9. 14. The Great Barrier Reef will become this in 10 to 20 years.
  10. 15. The Great Barrier Reef spans to this location.
  11. 17. The waters of the Great Barrier Reef contain a complex variety of life in a delicately balanced environment known as an...
  12. 18. This term is used to describe a range of different things.
  13. 19. One of the many minerals treasured by miners on the Great Barrier Reef.
Down
  1. 1. This type of fuel can cause pollution of the reef's waters.
  2. 3. This is one of the ecological factors of tourism affecting the Great Barrier Reef.
  3. 4. The largest living organism on earth.
  4. 6. These are tiny plants and animals from the water that pass through parts of their ecosystems.
  5. 8. These places are common for tourists who are traveling far from home.
  6. 13. The Great Barrier Reef is located off the coast of...
  7. 16. Unexpected changes in this may cause coral polyps to die.