Example One
| Step
# 1 Mystery Class # 1's sunrise time is given as 3:28 (GMT) on March 20. This means it is very early morning in Greenwich when the sun rises at this site. |
BOX A 3:28 A.M. (3/20) |
| Step
# 2 Sunrise time at Greenwich on March 20 is 06:02 A.M. |
BOX B 06:02 A.M. (3/20) |
| Step
# 3 The number of hours and minutes between A and B is 2hours and 34 minutes |
BOX C 2hrs 34min |
| Step
# 4 Convert the amount of time in Box C into minutes by multiplying the hours by 60 and adding the remaining minutes ( 2 x 60 = 120 + 34 = 154 minutes) |
BOX D 154 minutes |
| Step
# 5 Figure out the degrees away from Greenwich by dividing the minutes in Box D by 4 ( 154 divided by 4 = 38.5 degrees) |
BOX E 38.5 degrees |
| Step
# 6 Eastern or Western Hemisphere? To determine the site's approximate longitude you need to know if it is in the Eastern or Western Hemisphere (i.e East or West of Greenwich, which is 0 degrees). Here, 3:28 A.M. on 3/20 was earlier than 06:02 A.M. on 3/20, so this longitude location is East. This means the site is east of Greenwich, in the Eastern Hemisphere. |
BOX F 38.5 E |
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