Marine Ecosystems

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Across
  1. 2. an aquatic ecosystem that has A LOT of salt
  2. 3. 200 meters - regular photosynthesis
  3. 5. in tropical seas, very important!, ¼ of all ocean species live here!
  4. 6. where oceans and land connect (often flood)
  5. 9. 1,000 meters - some photosynthesis (twilight zone)
  6. 10. found in tropical areas
  7. 11. extremely deep - NO sunlight (midnight zone)
Down
  1. 1. where oceans and rivers connect
  2. 4. extremely large and varied
  3. 7. not alive (sunlight, oxygen, temperature)
  4. 8. alive (plants, animals, microbes)