Which of the following is a reasonable approximation of the rate that plates move?
A) the speed a turtle walks
B) the rate of growth of human hair or fingernails
C) the speed of a mountain glacier
D) the speed of deep ocean currents
Ans: B) the rate of growth of human hair or fingernails
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Cognitive images are mental maps that precisely portray real life
Indicate whether this statement is true or false.
Trapped gases in cooling lava form cavities called ____________________. Cinder cones may contain
large amounts of ____________________, which contains more of these cavities than it does rock Fill in the blank(s) with the appropriate word(s).
The construction of a dam across a river is likely to cause ________ upstream and ________ downstream
A) erosion; aggradation B) erosion; erosion C) aggradation; erosion D) aggradation; aggradation
Which of the following is true about the water table?
A. The water table can slope in opposite directions beneath a hill. B. The shape of the water table does not mimic topography. C. Deeper water below the water table must flow in the same direction as near-surface water. D. All of these. E. None of these.