Internet Links

Following are links to Internet resources that can be used to support instruction of the Math World feature for this chapter.

A Walk Through Time
Visit this site to read general historical information and view pictures of sundials, water clocks, hourglasses, and modern clocks.
http://physics.nist.gov/GenInt/Time/time.html

Old Babylonian Weights and Measures
You'll find a listing of the different units of measure used by ancient Babylonians at this Web page created by associate professor of mathematics Duncan Melville, of St. Lawrence University in Canton, New York.
http://it.stlawu.edu/~dmelvill/mesomath/obmetrology.html

A Walk Through Time
This marvelous Web site describes and illustrates the ways people have measured time throughout the ages, from ancient stone calendars to modern atomic clocks. The National Institute of Standards and Technology created and hosts this site.
http://physics.nist.gov/GenInt/Time/time.html

Earth & Sky: Teacher's Lounge
You'll find plenty of teaching resources for astronomy at this page from the Earth & Sky Web site, which supports and transcribes a daily science radio series.
http://www.earthsky.com/Teachers/