Newton showed that differential tidal forces are inversely proportional to the ________ of the distance between the two objects.
A. square root
B. first power
C. logarithm
D. cube
E. square
Answer: D
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Continental crust extends farther down into the mantle than oceanic crust because
A) continental crust is thicker than oceanic crust. B) oceanic crust is buoyant and rides atop the mantle. C) continental crust is heavier than oceanic crust. D) continental crust sinks into the mantle and asthenosphere.
A likely scenario for causing the population trend shown in the diagram below is
A) the carrying capacity changed.
B) favorable environmental conditions caused a temporary population explosion above the carrying capacity.
C) a keystone predator was removed from the ecosystem at the point that the population began to decline.
D) primary succession began at the time when the population reached its peak.
The rise of instant slums is the consequence of
A) overurbanization. B) counterurbanization. C) decentralization. D) reurbanization.
What was the composition of the early atmosphere of Earth? What changes occurred to the early
atmosphere? What was the key factor in creating an atmosphere similar to today? What will be an ideal response?