Approximately what percent of the U.S. population derives a portion of its fresh water from groundwater sources?
A) 10 percent B) 30 percent C) 50 percent D) 90 percent
Question 2
Which of the following is NOT a criteria to be classified as a mineral?
A) Specific chemical composition
B) Crystalline structure
C) Solid
D) Anthropogenic
E) Inorganic