Since the 1980s, the United States has
A) increased its oil discoveries and production and today imports about 50% of its oil.
B) seen its oil production keep pace with consumption.
C) been steadily consuming more oil and producing less.
D) improved the efficiency of its technology and now imports no foreign oil.
C
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The plant shown in the photograph below is an invasive species that often clogs waterways in the southeastern United States. It is the
A) lily pad.
B) coypu.
C) water hyacinth.
D) cottonmouth.
Two freight cars of identical mass roll towards each other on a level track. The speed of one car is 2 m/s and the other is 1 m/s. After collision they couple and roll together with a speed of
A. 0.67 m/s. B. 0.33 m/s. C. 0.5 m/s. D. 1.0 m/s.
A paternoster lake is a singular lake filling a small cirque basin behind risers of rock material
Indicate whether the statement is true or false
Reefs parallel to the shore but separated from it by wide, deep lagoons are called
A. atolls B. lagoonal reefs C. barrier reefs D. fringing reefs