What two pieces of information would researchers need to have in order to calculate the rate of plate motion for seafloor spreading?
A) Age of the continent and depth of the water
B) Distance from the rift and age of seafloor sample
C) Age of the seafloor sample and age of the continent
D) Type of rock and distance from the rift
Answer: B
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According to Galileo, the test of scientific truth is
A. evident patterns in nature. B. philosophical discussion. C. experiment. D. logic.
An extinct volcano ____
A)existed during a past geological period and cannot be detected by humans B)has not erupted during historic time, but may do so again C)is the same thing as a dormant volcano D)has not erupted during historic time and shows no sign of doing so in the future E)can only be detected with specialized equipment
The disappearance of the Aral Sea is attributed to
A) the diversion of water for irrigation. B) natural variations in rainfall and temperature. C) human-induced variations in rainfall and temperature from global climate change. D) increased runoff from the sea. E) point-source pollution from nuclear power plants.
What is the mass number of an atom which is made up of 27 protons,33 neutrons and 27 electrons?
A) 87 B) 60 C) 33 D) 27