Lesson 1 of 16
Something that repeats
Show on a big screenA cooker whistles when the rice is ready. Can whistles work as a clock?
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The idea
Whistles are a clock only if the time between them is equal.
Your day repeats: sunrise, noon, sunset. The Moon's shape repeats too. People counted repeats like these to make calendars.
A clock counts a repeat that has equal gaps. A gap is the time between two repeats.
Step 1 of 4
- Made-up gaps between whistles: 41 s, 27 s, 60 s, 33 s.
- The longest gap is 60 s.
- The shortest gap is 27 s.
- 60 is more than twice 27. The gaps are not equal.
Try the lab to finish this lesson.