Easy Crossword

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Across
  1. 3. lessons with experiments
  2. 4. _____, the Social Studies teacher
  3. 5. garbage _____
  4. 7. school in a _____
  5. 9. best friend
  6. 10. of discussion
Down
  1. 1. _____
  2. 2. _____ on roads
  3. 6. _____ emitted by vehicles
  4. 8. of _____ clock