Real World: Longitude and Time Zones
What determines how long a second, minute, or hour lasts? Learn about the development of the units of time and how they depend on the rotation of the Earth on its axis. Learn how time zones are related to lines of longitude.
Background Information
Grades 6 through 12
Activities
Grades 6 through 8
- University of California, Berkeley Universal Time
- NASA Goddard Space Flight Center Measuring Time
Grades 6 through 12
- NASA Make Your Own Sundial
- NASA GSFC The Sundial