Spelling words

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Across
  1. 3. it can be sports or maths or english, or sort of homework
  2. 6. scientist working on astronomy
  3. 8. be nice, have good manners
  4. 9. a system of billions stars
  5. 10. describing something very properly
  6. 12. mix together pastry ingredients
  7. 13. fixed, clear, certain
  8. 14. to fire up quickly
Down
  1. 1. super clear, unmarked
  2. 2. highly explosive thing
  3. 4. a person who is taken to prison or animals catches to live in the zoo
  4. 5. regular doing the same thing like sports
  5. 7. periodical publications with lots of photos
  6. 8. director of the school
  7. 11. the thing or the person you like the most