Time and Longitude
Locate the Prime Meridian and Greenwich, England on the map.

• Longitude: How far east or west of the Prime Meridian do you live (in degrees)?
• Time: What is the time difference between Greenwich, England and your home town (in hours and minutes)?

Time Clues Coming March 9
These facts will help you use the time clues to estimate the longitude of the Mystery sites:

• The Prime Meridian is the reference line you will use for measuring longitude.
• Greenwich, England is the reference point you will use for measuring time.