Earth's mantle is exposed on the ocean floor in great slabs of rock between widely-spaced volcanoes in ________
A) deep-ocean trenches
B) oceanic ridges
C) oceanic rises
D) ultra-slow spreading centers
E) volcanic arcs
D
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What is the approximate diameter of the rim of the Okmok Caldera?
The question is based on Map T-2, the “Umnak, Alaska,” topographic map (scale 1:250,000; contour interval 200 feet), Map T-21b, a satellite image; and Figures 35-3 and 35-4, a shaded relief map and a stereogram showing the Okmok Caldera (53°25'33"N, 168°07'38"W) on Umnak Island in the Aleutian Islands. What will be an ideal response?
Which requires the most amount of work on the brakes of a car?
A) slowing down from 100 km/h to 70 km/h B) slowing down from 70 km/h to a stop C) equal amounts for either
Match the seafloor terms to their correct definitions
A) Flat seafloor in the deep ocean B) Wedge of sediments deposited by turbidity currents that formed at the base of the slope C) Narrow creases in the seafloor that result from subduction D) Gently sloping, submerged extension of the continent E) A steep incline that marks the boundary between the continental crust and the oceanic crust 1) Continental shelf 2) Abyssal plain 3) Submarine trench 4) Continental rise 5) Continental slope
Which amino acid can be found in proteins in both its protonated and unprotonated forms?
A) alanine B) glycine C) histidine D) phenylalanine