teachers/fstride/0DF428FD-00870BC8.5 Time Zones The Earth rotates 15 degrees every hour. The idea behind multiple time zones teachers/fstride/10685C3A-00870BC8.11 Time Zones The Earth rotates 15 degrees every hour. The idea behind multiple time zones Teachers/fstride/10685CCD-00870BC8.3 Grade 9 Applied Geography Unit 1 directory teachers fstride |