Bibliography
- Board of Education. "Making Connections." Board of Education 2000:9.
- Hallman, Rick. The
Living Enviroment Biology. New York: Amsco School Publications, Inc., 2005.
- Kraus, David. Concepts
in Modern Biology. New Jersey: Globe Book, 1993.
Pictures
- http://tbn3.google.com/images?q=tbn:8QmDdPeFHR6Z5M:http://laured8.files.wordpress.com/2009/02/ct2-27_clothespin.jpg
- http://tbn0.google.com/images?q=tbn:vW_ETetOdtDlvM:http://pgpmatspjimr.files.wordpress.com/2009/01/stopwatch.jpg
- http://tbn1.google.com/images?q=tbn:M2VdMTmshW3TlM:http://wpcontent.answers.com/wikipedia/en/thumb/0/0e/Clothespin.jpg/200px-Clothespin.jpg
