Radiometric dating is based upon
a. the presence of fossils.
b. cross-cutting relationships.
c. spontaneous decay of radioactive elements.
d. superposition.
e. dendrochronology.
C
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For a small business the internet tends to blur boundaries
a. industry b. geographic c. skill-dependent d. technological.
If sedimentary rocks are tilted steeply, they most likely have experienced an episode of deformation
a. True b. False
Which is denser: a 100-million-year-old oceanic lithosphere near a convergent boundary, a 15-million-year-old oceanic lithosphere near a rift, or the upper part of the asthenosphere?
A) A 15-million-year-old oceanic lithosphere B) 100-million-year-old oceanic lithosphere C) Upper asthenosphere D) They all have the same density.
Which industrialized nation has refused to sign the International Basel Convention to reduce and/or control movement of hazardous e-waste across international boundaries?
A. Canada B. the United States C. Japan D. South Korea E. European Union