Crossword

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Across
  1. 3. The measurement around something
  2. 4. A unit of measurement
  3. 5. To move something away from something
  4. 6. Something that is so small, you can’t see it with the naked eye
  5. 10. Something with bent surfaces to let you see multiple of something
  6. 12. To move something towards something
  7. 13. A farming vehicle
  8. 14. The measurement through something
  9. 17. Something that measures speed
  10. 18. A very small particle
  11. 19. Someone who takes a photograph
  12. 20. Something that allows you to feel and hear a human heartbeat
Down
  1. 1. Something that allows you to see microscopic objects
  2. 2. Friction
  3. 7. To take away
  4. 8. A picture made by a camera
  5. 9. Seeing something’s future
  6. 11. A long lens
  7. 15. Something that measure temperature
  8. 16. A photographic copy