Alice Barr shared a good collection of Google Maps uses in science.
KQED Quest has a collection of six examples of science based Google Maps. The collection includes examples of use in environmental science and geology lessons. One of my former colleagues also used Google Maps in geology lessons.
Applications for Education
KQED Quest's science-based Google Maps are good models of what is possible with Google Maps. For directions on creating your own Google Maps, please see Google Maps for Educators.