Crossword

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Across
  1. 4. To save e.g. energy
  2. 6. How long something takes
  3. 9. Opposite of clockwise
  4. 11. A three dimensional measurement
  5. 13. Two weeks
  6. 14. To keep alive or in existence
  7. 15. Opposite of forwards
  8. 18. At a later part in time
  9. 20. Harmful to the environment
  10. 22. Make bigger
  11. 23. How good something is
  12. 24. Prize after achieving something
Down
  1. 1. Depth of liquid
  2. 2. Used in specifying the hour of the day
  3. 3. Brought into social contact
  4. 5. Equivalent
  5. 7. A number of things or parts working together
  6. 8. Smaller than a centimetre
  7. 10. An informed guess
  8. 12. Direction
  9. 16. Completely destroy
  10. 17. The start
  11. 19. How many
  12. 21. Childish argument