The tigris and euphrates rivers originate in present-day
a. turkey.
b. persia.
c. egypt.
d. iran.

Democratic vs democratic whats the difference? ?

Describe the four major spheres of the earth system; identify the parts of the earth they each represent. explain what is meant by the "earth system."

Which would be most likely to contain a good aquifer—igneous rock, sedimentary rock, or metamorphic rock? explain what qualities of this rock type make it a good aquifer. 500 word minimum response