Group One crossword

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Across
  1. 3. the planet we live on
  2. 7. being very strong
  3. 8. doing experiments to understand the world
  4. 11. when the day ends and the sun goes down
  5. 12. in charge of a country or state
  6. 14. valuable items
  7. 15. a contest or competition
  8. 17. relating to science
  9. 20. don't remember
  10. 21. a country in Europe where Marie Curie is from
  11. 25. gaining a new skill or idea
  12. 26. something you play that makes music
  13. 28. the thing you like the best
Down
  1. 1. a series of words in a row
  2. 2. someone who leads students
  3. 4. looking at something beautiful with surprise
  4. 5. past tense of "mean"
  5. 6. large country that controlled Poland
  6. 9. facing difficult conflict
  7. 10. not a girl
  8. 13. accident
  9. 16. not a boy
  10. 18. well known and loved
  11. 19. a series of letters put to gether to create meaning
  12. 21. you can text or make calls with it
  13. 22. have to have something
  14. 23. to twirl around in a circle
  15. 24. electronic device
  16. 27. used to fix things, like a hammer
  17. 28. one more than 3, one less than 5