The scientific method

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Across
  1. 1. /adj/ relating to basic or most important qualities
  2. 3. /n/ a connection between two people, things, or ideas
  3. 6. /adj/ staying the same, or not getting less or more
  4. 7. /adj/ based on truth or reason; able to be accepted:
  5. 9. /v/ to refuse to accept
  6. 10. /v/ to change or cause something to change in amount or level, especially from one occasion to another
  7. 11. /v/ to change something to improve it or make it more acceptable
  8. 12. /v/ to agree to take something
  9. 15. /n/ a value, discovered by measuring, that correponds to the size, shape, quality, etc.
  10. 16. /v/ to say or prove that a person, statement, opinion, etc. is wrong or false
  11. 17. /adj/ not able to be changed
  12. 18. /v/ to help to show something to be true
Down
  1. 2. /adv/ in a way that shows you are not certain or confident
  2. 4. /v/ to state the opposite of what someone has said, or (of one fact or statement) to be so different from another fact or statement that one of them must be wrong
  3. 5. /n/ effect or result
  4. 8. /v/ to notice or understand the difference between two things
  5. 11. /adv/ used to emphasize that something is not large, important, or effective when compared to something else
  6. 13. /adj/ opposite
  7. 14. /v/to ask a question, especially in a formal situation