WORD BUILDING

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Across
  1. 5. Clue: Add a prefix to visible to mean not visible
  2. 6. Clue: Using the root astro-, build a word meaning study of stars
  3. 7. Clue: Add -ist to a root meaning motor or motion
  4. 10. Clue: Add a suffix to create to form a noun meaning a person who creates
  5. 11. Clue: Form a word meaning to remove water using the root word hydrate
  6. 13. Clue: Add -logy to a root meaning life
  7. 15. Clue: Form a word meaning able to be believed using the root cred-
Down
  1. 1. Clue: Add -phobia to a root meaning water
  2. 2. Clue: Add -cide to a root meaning insect
  3. 3. Clue: Form a word meaning one who writes about life stories
  4. 4. Clue: Form a word meaning study of the mind using the root psych-
  5. 8. Clue: Add a prefix to circulate to mean send around again
  6. 9. Clue: Add a prefix to thermal to mean able to withstand heat
  7. 12. Clue: Add a prefix to moral to mean without moral principles
  8. 14. Clue: Add inter- to a root meaning national to mean between countries