Jim Gilbert Home Page Challenge Questions Today's News Spring's Journey North Report Your Sightings Teacher's Manual Search Journey North return to: A/CPB

Example # 2 Back to Mystery Class Worksheet Back to Equinox Sunrise Table Back to Today's Report Step # 1 Mystery Class #4's sunrise time is given as 10:27 (GMT) on March 20. This means it was morning in Greenwich when the sun rose at this site. BOX A 10:27 (3/20) Step # 2 Sunrise time at Greenwich was 6:03 A.M. BOX B 6:03 A.M. Step # 3 The number of hours and minutes between A and B is 4 hours and 24 minutes BOX C 4 hrs 24 min Step # 4 Convert the amount of time in Box C into minutes by multiplying the hours by 60 and adding the remaining minutes (4 x 60=240 + 24= 264 minutes) BOX D 264 minutes Step # 5 Figure out the degrees away from Greenwich by dividing the minutes in Box D by 4 (264 divided by 4 = 66.0 degrees) BOX E 66 degrees Step # 6 Eastern or Western Hemisphere? To determine the site's 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, 10:27 on 3/20 was later than 6:03 A.M. on 3/20. This means the site is west of Greenwich, in the Western Hemisphere. BOX F 66.0 W