Latitude and Longitude
Latitude and Longitude in Electronic Passport
Explains the ancients understanding of time 
Latitude and Longitude Webquest
Activities using longitude and latitude 
Crossword
NY Times Tutorial on Longitude and Latitude 
Surface Distances
Calculates surface distances or circular route differences between two points 
Getty Thesaurus of Geographic Names
Enter a geographic name and it returns latitude and longitude of that place. 
The Degree Confluence Project (Longitudes/Latitudes)

A non-profit, all volunteer project to photograph and record each Longitude/Latitude intersection on the planet earth ... (except over the ocean).  Each confluence visited includes a photograph.  (Massachusetts has only 1 (42oN, 71oW - 1 1/2 mi, WNW of Bridgewater) and Rhode Island has none.)

Crack the Code
A longitude and latitude activity from National Geographic Expeditions
Live Weather Images
This site gives you sunrise/sunset data for any location if you know the longitude and latitude.  This site also has weather and radar links.
Latitude and Longitude Position Finder
This site allows one to identify the latitude and longitude position of any point within the United States.  There are 9 zoom levels so it is possible to zoom to find the longitude and latitude of a particular street.
Time Zone Activity

Activities on calculating Time Zones differences.

Manchester (U.K.) Airport Activities Main Page

Longitude and Time Zones
From Iowa State, explains how mean solar time is related to longitude.

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Updated June 10, 2004