Set3

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Across
  1. 3. Peculiar to tropics, very hot and humid, region between Tropic of Cancer and Capricorn
  2. 4. Zone of ocean nearest to the top, Light from the sun
  3. 7. period of time in the middle of night, a zone in the ocean 1-4km deep where no light reaches and no plants can grow (all animals are scavengers or predators)
  4. 8. a complex network of interconnected systems, a biological community of interacting organisms and their physical environment
  5. 11. zone of ocean between sunlight and midnight where very little sunlight gets here, period of day between daylight and darkness, gradual decline of something
  6. 13. quality of being similar or equivalent, an estimate of the similarities or dissimilarities between two things or people
  7. 14. involving interaction between two different organisms living in close physical association, denoting a mutually beneficial relationship between different groups
  8. 15. a word describing a noun
  9. 17. relating to the countryside
  10. 18. an area of sandy, stony, or rocky land bordering and level with the sea
  11. 20. act of causing something, relationship between cause and effect
  12. 21. A number which is added to another
  13. 22. calculate
  14. 23. a solid which has six rectangular faces at right angles to each other, 3-d of a rectangle
  15. 26. a symbiotic relationship in which both organisms benefit, clown fish and sea anemone have this interdependent relationship, coral and algae, pistol shrimp and gobies
  16. 27. crucial, of vital importance, an essential or urgent thing, type of sentence that expresses a direct command, request, invitations, warning, or instruction
  17. 28. a marked effect or influence (noun), action of something coming forcibly in contact with something else (noun), impression, result, aftermath
  18. 29. a desirable or useful feature or facility of a building or place
Down
  1. 1. diary (noun), a newspaper or magazine that deals with a particular subject (noun), write in a diary (verb)
  2. 2. a symbiotic relationship in which one benefits and the other is harmed, sea lice and walrus
  3. 5. a symbiotic relationship in which one benefits and the other derives neither benefit nor harm, barnacles and whales
  4. 6. a pictorial symbol for a word or phrase, type of graph or chart to represent data
  5. 9. process of combining to increase in number, result is a product, process of calculating 8 times 5
  6. 10. the answer obtained on multiplying 2 numbers, something that is manufactured through an action or process
  7. 11. A hundred tens
  8. 12. relating to a town or city, area / neighborhood with high population and lots of amenities
  9. 16. two or more things relying on each other
  10. 17. the way in which two or more people or things are connected
  11. 19. an animal, a fictional or imaginary being, a person of a specific kind
  12. 24. large algae growing in the sea or on rocks
  13. 25. relating to water, growing or living in or near water