• GS4-U2-Review 2
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  • A unit of time equal to 60 minutes. It's how we measure shorter periods of time in a day.
    hour
  • The shortest unit of time, measuring moments. There are 60 seconds in a minute.
    second
  • A period of 10 years. For example, from 2010 to 2019 is a decade.
    decade
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