Geologists Vine, Matthews and Morley found striking similarities and symmetry in the pattern of _____ in rocks on opposite sides of ocean ridges.
A ) mineralization
B ) density
C ) gravity
D ) magnetic residue
D ) magnetic residue
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A process known as ____________________ is used to convert solid coal into synthetic natural gas, removing sulfur and other impurities.
Fill in the blank(s) with the appropriate word(s).
The close link between geography and politics is called
A) comparative politics B) political science C) geomorphology D) international relations E) geopolitics
A stream's equilibrium profile shows a delicate balance among gradient, discharge, flow velocity, channel shape and sediment load. We would say that the stream is ____
A)superposed B)incised C)graded D)divided E)braided
Most metals, such as iron and copper, do not occur in a pure state in Earth's crust, but occur within ________
A) ores B) sediments C) igneous rocks D) the O horizon of the soil E) organic materials