Some clocks use special energy to keep going. Like how your toy car keeps moving even when you stop pushing it, because it has a spring inside that unwinds slowly and steadily. These clocks have an extra part called a battery, which gives them power for years, so they can count seconds without being connected to anything else.
Examples
- A wall clock in your bedroom keeps ticking every day because it has a battery inside.
- Your watch doesn’t need a wire from the phone to know what time it is.
- Even if you take a digital clock to the moon, it still tells the correct time.
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See also
- How Do Clocks Know What Time It Is?
- How Do Clocks Know the Time?
- How Do Clock Towers Work?
- How Does a Clock Know When to Ring?
- How Does a Watch Keep Time Accurately?
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