|Middle School - Life Science - California - Pearson|
|Topics of learning Science for 7th and 8th graders. Grade 7 / Grade 8 / Middle School The sub-topics are published by http://www.phschool.com/webcodes10/index.cfm?wcprefix=cvk&wcsuffix=9999&area=view|
Nature of Waves
Physical Science 7.3b - Light Waves Part 1
From the Physical Science course by Derek Owens. Eighth grade level. Distance Learning courses are available at http://www.derekowens.com.