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Which of the following is NOT a way to change the porosity of a rock?


A) cut the rock with fractures
B) compact clay and other sediment
C) deposit natural cement into pores
D) fill the pores with water

E) B) and D)
F) A) and C)

Correct Answer

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Which source of drinking water is most likely to be pure and safe to drink?


A) spring water
B) bottled spring water
C) river water
D) municipal water

E) A) and B)
F) C) and D)

Correct Answer

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