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A Brief History of Time Measurement

Noticing the regular movement of the Sun and the stars has led to a desire to measure time. This article for teachers and learners looks at the history of man's need to measure things.

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Order, Order!

Can you place these quantities in order from smallest to largest?

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In Order

Can you rank these quantities in order? You may need to find out extra information or perform some experiments to justify your rankings.

The Time Is ...

Stage: 2 Challenge Level: Challenge Level:2 Challenge Level:2

You might find it a good idea to put all the times in the same format - that is make them all digital times or all clock times. This sheet of clock faces might help.
 
If you are unsure about $24$-hour times, take $12$ from the hour digit given so 13.15 becomes 1.15.
The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice. More information on many of our other activities can be found here.
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NRICH is part of the family of activities in the Millennium Mathematics Project.