Photovoltaic cells ________
A) have small rotational generators built into every cell
B) are the major form of renewable energy produced in the United States
C) are increasingly costly produce which precludes major commercial application
D) require an outside source of electricity to generate electricity on their own
E) rely on the electrical current produced when silicon is struck by sunlight
E
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The inner portion of the mantle is the ____________________, a zone of hot, partly melted flowing pliable rock
Fill in the blanks with correct word
The mixing of the races is known as
A) mestizo B) Columbian Exchange C) ethnic classification D) miscegenation E) syncretism
What type of slope failure is shown in this figure?
A) Rotational slide
B) Creep
C) Rock avalanche
D) Debris flow
E) Rock fall
What is the evidence that the Younger Dryas occurred?
A) proxy temperature records from fossils B) ice core samples from Greenland C) temperature records from numerous monitoring stations D) both A and B