http://www.google.com/search?q=15+facts+about+clay&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA_en
Read carefully.
What are 15 facts about clay that are easy
2 answers
You'll find at least 15 facts about clay here.
http://www.encyclopedia.com/doc/1E1-clay.html
http://www.encyclopedia.com/doc/1E1-clay.html