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Measuring Time

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Learning Goals To measure time, we start counting units of time when the activity begins and stop counting when the activity ends. The second is a small unit of time. It usually takes several seconds to measure the duration of an activity. Time can be shown using 12-h or 24-h notation. Four digits are used to write time in 24-h notation.

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Many analog clocks show time in hours, minutes, and seconds. This clock shows a time of 10 hours, 10 minutes and 25 seconds. We write 10h 10 min 25 s In SI notation, we write: 10:10:25 SI Notation in time is telling time to the hour, second and minute (example 03:45:02). In date it tells the year month and day (example 2009 07 25).

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What is the SI notation for the following Analog Clocks

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What is the SI notation for the following Dates

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What time is shown on this watch? Is it morning or afternoon? How do we show morning and afternoon when we write down times? Have you seen time written a different way?

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Converting 24-hr to 12-hr 24 hr12 hr 13:55 19:37 22:56 00:01 08:30 11:15

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Lesson 2: The 24-Hour Clock 1.a) Oscar arrived at the library at 09:15 and left at 13:10. How long did Oscar spend in the library? b) Anis plane departs at 22:45 and lands at 08:10. How long was the flight?

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Homework Gr6 – pg 211; qs 1-5

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