Igneous rock is formed from
A. lava that freezes on Earth's surface.
B. high temperatures and pressures acting on subsurface rock.
C. crystallization of magma.
D. all of the above
Answer: C
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What are the abundant elements that make up the composition of Earth's present-day atmosphere?
A) oxygen and carbon dioxide B) nitrogen and oxygen C) carbon dioxide, nitrogen, and hydrogen D) hydrogen and oxygen
Hurricanes dissipate when ____
A) they move over colder water B) they move over warmer water C) surface inflow of air is less than upper-level outflow of air D) water temperatures below the eyewall increase
The greatest threats to groundwater supplies are
A) groundwater pollution and depletion. B) global warming and the construction of dams. C) increased evaporation and increased precipitation. D) evapotranspiration and runoff.
Which of the following was a result of the Spanish-American War of 1898?
A) the American acquisition of the Lesser Antilles B) the American military defeat at Guantanamo Bay and surrender of all its Caribbean possessions to the Spanish C) the return of Cuba to Spanish rule D) The United States and Spain split Hispaniola, with Spain acquiring the Dominican Republic and the United States acquiring Haiti E) Cuban independence from Spain and the transfer of Puerto Rico to American sovereignty