Where is arsenic most likely to be common in drinking water?
A) near industrial plants
B) near large batholiths of metamorphic rock
C) where water flows through volcanic rocks
D) where water flows across the surface for a long distance
Question 2
Which is not one the most common ore deposits that form in sedimentary rocks that is associated with hard-water deposits?
A) zinc
B) copper
C) magnesium
D) lead
