What does a radioactive-isotope aging test on a rock determine?

A) the age of the rock since metamorphism
B) the date of formation of the rock-forming minerals
C) the length of time the rock has existed in its location
D) the age of the rock since sedimentation


Answer: B

Environmental & Atmospheric Sciences

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What kind of metabolic rate do humans have?

a. Endothermic b. Exothermic c. Ectothermic d. Hyperthermic

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A)walk on land B)swim in the ocean C)limbs have no function D)swim in shallow streams E)run

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Indicate whether the statement is true or false

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