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How long is a Metre?
This three minute video, from Twig World, explains that the metre is the base unit for measurement for most of the world, but how was it agreed how long a metre should be? The need for standardised units of measurement is discussed and the value of the metre being one ten millionth of the distance from the North Pole to the equator explained, this later being redefined more accurately in 1983.
The video is accompanied by a lesson plan and a worksheet covering measurement, estimation and conversion between metric units.
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How long is a metre? Transcript 45.5 KB
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How long is a metre? Worksheet 3.05 MB
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