The East African Rift is an example of a _________ plate boundary
a. convergent
b. divergent
c. transform
B
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Which of the following occurs when mountain belts are eroded?
A) Erosion is accompanied by isostatic rebound. B) The continental crust becomes thinner. C) Deep metamorphic and plutonic rocks can be uplifted to the surface. D) All of these are correct.
From the end of the Cold War through 2013, Russian nuclear warheads have been
A) stored widely in the former Soviet Union where they remain today with minimal protection. B) dismantled, but their nuclear waste remains in Russian facilities with minimal security. C) dismantled, with the nuclear fuel purchased by the United States for its nuclear power plants. D) concentrated in two centralized Russian locations with high levels of security, awaiting long-term storage.
Which isomer of pentane has the highest boiling point?
A) pentane B) 2-methylbutane C) 2,2-dimethylpropane D) None, they all have the same boiling point.
Which of the following is NOT an issue in biodiversity conservation in the 21st century?
A) Threats to endangered species B) Human population growth C) The ill effects of climate change D) Biodiversity conservation in the 21st century requires addressing threats to endangered species, the ill effects of climate change, and human population pressures.