Additional online reading Welcome to BFSU: › Forums › Volume One › Learning Progression “A”: Nature of Matter › Lesson A-4. Matter I: Its Particulate Nature › Additional online reading Tagged: Enhancement This topic has 0 replies, 1 voice, and was last updated 10 years, 1 month ago by CJRichey. Viewing 0 reply threads Author Posts November 7, 2014 at 9:27 am #315 CJRicheyKeymaster University of Illinois Extension What soil is made of? http://urbanext.illinois.edu/gpe/case2/c2facts1.html Or on soil types: http://urbanext.illinois.edu/gpe/case2/c2facts2.html Author Posts Viewing 0 reply threads You must be logged in to reply to this topic.