The advent of ____ allowed geologists to assign numeric dates to the geologic time scale
a. uniformitarianism
b. radiometric dating
c. relative dating
d. fossil succession
e. stratigraphic nomenclature
ANSWER: b
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When stable air is forced to lift as it passes over a mountain range, the air may become saturated and condensation may occur. In this case, the air is
A) stable. B) unstable. C) conditionally unstable.
A layer of dust or salt particles suspended above a region is called ____________________
Fill in the blank with correct word.
Chaos and anarchy thrived after the Soviet forces withdrew from Afghanistan, but the group known as __________ finally filled the power vacuum.
a. the Taliban b. Mujahideen c. the Northern Alliance d. the Islamic fundamentalists e. al-Qaeda 0
By definition, an ore is a mineral rich in valuable metals. To be considered as an ore means that the
A) metals can be economically extracted to yield a profit. B) metals are extremely valuable. C) deposit is very rich and abundant in valuable metals. D) metallic minerals are very abundant.