With all of the sun's energy striking the Earth every second of every day, why doesn't the Earth overheat and kill all life living on it?
A) The Earth is so large and dense that it absorbs all of this heat.
B) The Earth is overheating regionally, melting rocks into the lava of volcanoes.
C) The Earth maintains a balance by radiating this heat back into space.
D) The atmosphere of the Earth prevents the solar radiation from reaching the Earth's surface.
C
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The subsurface point of rupture of an earthquake is called the:
a. center of rupture b. epicenter c. hypocenter d. focal point
Debris slides are common on slopes underlain by:
a. alluvium b. fractured bedrock c. colluvium d. sand
What type of charge is carried by the biologically active portion of bile salts?
A) negative B) none C) positive D) It varies from one bile salt to another.
Which of the following is the relationship between the rem and the sievert?
A) 1 rem = 100 Sv B) 1 rem = 1000 Sv C) 1 rem = 0.01 Sv D) 1 rem = 0.001 Sv