Crossword 4

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Across
  1. 3. one-sixtieth part of a minute
  2. 5. movement of pendulum
  3. 8. CGS unit of length
  4. 10. an astronomer who proved periodic motion of pendulum
Down
  1. 1. an event occurring at regular intervals of time
  2. 2. an old method of measuring time
  3. 4. motion with constant speed
  4. 6. speed-indicating device in cars and bikes
  5. 7. a group of consecutive seven days
  6. 9. fastest land running animal