Motion and Time

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Across
  1. 3. a weight hung from a string
  2. 5. back and forth motion
  3. 7. a substance whose crystals can vibrate very fast, at a very precise rate
  4. 9. standard unit for time
  5. 10. standard unit for length
Down
  1. 1. not a standard unit
  2. 2. standard unit for mass
  3. 4. the comparison of a fixed quantity with an unknown quantity
  4. 6. standard unit for temperature
  5. 8. distance covered by moving an object in unit time