Page 156 - New Medley 1 Semester 1

Units of Measuring Time

In earlier days time was measured using different types of clocks.

Burning candle Sand clock Water clock Shadow on sun-dial

All of these were not accurate.

Nowadays we use standard unit of time which is same all over the

world.

Standard unit of time is second. [sec.]

 60 seconds make a minute.

 60 minutes make an hour.

 24 hours make a day.

 7 days make a week.

Instruments Used to Measure Time

Clocks

Wall clock Alarm clock Tower clock

Watches

Wristwatch Pocket watch

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