Where was the first hydrothermal vent discovered?
a. Mid-Atlantic Ridge
b. East Pacific Rise
c. Gulf of Mexico
d. Sea of Cortez
e. Juan de Fuca Ridge
b
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When air temperature increases, which of the following happens to the saturation vapour pressure?
A. It remains the same. B. It keeps increasing and decreasing. C. It increases. D. It decreases.
Which of the following rock types is not characteristic of volcanic domes?
A) Glassy volcanic rocks that are unstable over time B) Vesicular basalt with very large holes from dangerous gas C) Volcanic breccia formed by fracturing of the outer part of the dome D) Mixtures of pieces of the dome and ash from dome collapse
1992 and 1993 were cooler than average years primarily because
A) solar output dipped slightly. B) El Niño occurred. C) La Niña occurred. D) Mount Pinatubo erupted. E) ocean currents shifted significantly.
Some scientists think that Yellowstone could cause a future disaster because
A. land near Yellowstone is uplifting in some places and subsiding in others. B. past eruptions from Yellowstone carried ash over a huge area of western North America. C. scientists think that magma is still present at depth. D. the area is part of a caldera. E. All of these choices are correct.