Contributor NASA
In this 4:20 video, students find out what determines how long a second, minute, or hour lasts, how these units of time developed, and how they depend on the rotation of Earth on its axis. They also learn what lines of longitude are and how time zones are related to lines of longitude.
In this 4:20 video, students find out what determines how long a second, minute, or hour lasts, how these units of time developed, and how they depend on the rotation of Earth on its axis. They also learn what lines of longitude are and how time zones are related to lines of longitude.
Contributor NASA
MULTIMEDIA MODULE
Sixth grade, Seventh grade, Eighth grade
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