Book 3, Question 80
Why Do Clocks Keep Time?
Clocks keep time by counting a steady beat and showing the total as seconds, minutes and hours.
A clock counts equal little ticks and adds them up into seconds, minutes, and hours. Steady ticks make trustworthy time. That is why a good clock never gets bored of counting!
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Quick answers
What are the two parts of every clock?
Something that ticks with a steady beat, and something that counts the beats.
From the book
Page from A Million Whys Book 3
More fun facts
- Every clock has two parts: something that ticks with a steady beat, and something that counts the beats and shows the time.
- Atomic clocks use steady beats hidden inside atoms, which makes them far more accurate than any other kind of clock.
- The newest atomic clocks use light waves tuned to atoms and are billions of times more stable than ordinary clocks.
- NIST-F4, the main time standard clock in the United States, is one of fewer than 20 cesium fountain clocks in the world.
- An international group called the International Bureau of Weights and Measures gathers time signals from clocks around the world to make one shared time standard.
- Timekeeping has grown from simple sundials into a worldwide system that runs 24 hours a day and never misses a beat.
Questions kids ask
What makes a clock tick?
Every clock needs something with a steady beat, like a swinging pendulum or vibrating atoms, plus a part that counts the beats.