Subject: What causes some soils/sands to lose heat more quickly than others?

I am a homeschooled eighth grader currently doing a science experiment on 
the rate of heat loss in different kinds of soils and sand. I have been having 
trouble finding books and other information that I need for my research 
project. Information that would help me understand why one kind of soil loses 
heat more quickly than another kind of soil or sand. I found your name on the 
internet. Is there any information that you could recommend me getting. Books, 
pamphlets, other research. Can you give any information concerning this on your 
web page. Thank you for any help that you could give. I greatly appreciate it.
Sincerely,

Chelsea Taylor

170 Pleasant Drive

Aliquippa, PA  15001-1319

Re: What causes some soils/sands to lose heat more quickly than others?