Radiocarbon is ____________
a) carbon-12
b) carbon-13
c) carbon-14
d) both carbon-13 and carbon-14
e) none of these
Ans: c) carbon-14
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Indicate whether the statement is true or false.
About ________% of Afghanistan's population is Turkmen
A) 2 B) 15 C) 28 D) 40
What is the primary agent in frost wedging action
What will be an ideal response?
What did the Cassini spacecraft and its Huygens probe discover on the surface of Titan, the largest of Saturn's moons?
A. Networks of drainages were apparently carved by liquids. B. The surface was nearly completely covered by impact craters. C. There was a large impact crater that nearly blasted the moon apart. D. None of these choices are correct.