http://school.discovery.com/homeworkhelp/bjpinchbeck/bjscience.html

http://www.sciencebob.com/

http://www.newscientist.com/lastword/lwsend.jsp

http://www.thwww.com/mrwizard/homework14.htm

http://www.sci-journal.org/

http://homeworkspot.com/middle/science/

http://www.madsci.org/

http://www.schoolwork.org/science.html