The heat that drives the tectonic cycle is derived from
A. nuclear fusion.
B. radioactive decay.
C. chemical reactions.
D. sunlight.
Answer: B. radioactive decay.
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A wagon is being pulled with a constant force while its mass increases. Acceleration of the wagon
A. remains the same. B. increases. C. decreases. D. will be zero.
What factor has been most crucial to the survival of the relatively few remaining indigenous people of Latin America?
A) water B) land C) energy D) jobs E) education
Graded bedding forms when
a. erosion planes off a portion of the sea bottom. b. sediment is deposited on a steep slope or grade. c. turbidity currents deposit first coarse sediment then fine sediment. d. cross-bedding is truncated. e. turbidity currents deposit first fine sediment then coarse sediment.
With increasing depth in the earth the temperature increases as well. This is called as the
A. pressure gradient. B. geothermal gradient. C. thermal gradient. D. binary gradient.