The GeoMapApp Learning Activities website has not been significantly updated since 2012. We are preserving the web pages here because they still contain useful ideas and content. But be aware that the site may have out of date information.
The Teaching Activities Collection at Teach the Earth draws from newer projects across SERC.

Great Circles and Straight Lines

Initial Publication Date: November 27, 2012
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The concept of distances along great circles and straight lines is explored using maps. Airline flight paths are used as an example.









Great Circles and Straight Lines: Annotated Teacher Edition (Microsoft Word 4.6MB Nov27 12)
Great Circles and Straight Lines: Student Handout (Microsoft Word 2.6MB Nov27 12)
Great Circles and Straight Lines: Student Answer Sheet (Microsoft Word 614kB Nov27 12)