Time zones - it's afternoon in San Francisco, what time is it in Cairo, Egypt?

http://www.figurethis.org/challenges/c46/challenge.htm

This is an activity featuring a time zone map useful when teaching an interdisciplinary social studies and math unit focusing on geography and the time zones. It underscores the role of the earth s rotation in everyday life, and the need to understand the relationships between earth rotation, day and night, and time zones around the world.

Resource Type: Instructional Material - Activity
Grade Level: K, 1, 2, 3, 4, 5, 6