Unit 22

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Across
  1. 3. The final frontier
  2. 5. One hundredth of a metre
  3. 7. One hundredth of a dollar
  4. 8. To make something clear
  5. 9. In addition to
  6. 13. Summer, autumn, winter, or spring
  7. 16. A title under a main heading
  8. 17. From a point in the past
Down
  1. 1. Physical activity to stay fit
  2. 2. To go underwater
  3. 3. The ninth month of the year
  4. 4. A round shape with no corners
  5. 6. Not safe
  6. 10. Season of blooming flowers
  7. 11. Happened just one time
  8. 12. Well-known or celebrated
  9. 13. A boat's fabric wings
  10. 14. A class or teaching session
  11. 15. What you hear
  12. 16. Opposite of sour