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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.