Geographic earth materials modified over time by physical, chemical, and biological processes that serve many functions are considered
a)
equatorial parent materials
b)
modified soil horizons
c)
modified atmospheric materials
d)
nurtured dominant structures

  consider  the  following scenario,  then describe  how  you might conduct  a  study using  ansrs,  convenience sample, and a  voluntary response sample.  you  are  interested  in  parents'  opinion  of the  war  in  iraq.  your population  is  parents  of  high school students.  your question  is, "do you  believe that the  war  in