Get Cross with that Word...

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Across
  1. 4. Test
  2. 6. A danger to nesting shorebirds
  3. 7. Rhymes with drastic
  4. 8. Someone who loves discovering stuff
  5. 9. Where sky meets Earth
  6. 10. To do with ships
  7. 12. Breakfast cereal
  8. 13. Tasmanian marsupial
Down
  1. 1. Native only to that area
  2. 2. Journey
  3. 3. Another great way to travel!
  4. 5. Rubbish
  5. 8. Good on top of breakfast cereal
  6. 11. The best way to travel
  7. 13. Invasive plant