Which of the following statements about the fifty-year flood is true?
a. The fifty-year flood has a 50% chance of happening in a given year.
b. The fifty-year flood has a one-in-fifty chance of happening in any given year.
c. Once a fifty-year flood occurs, the region is safe for 49 years from another fifty-year
flood.
d. The fifty-year flood occurs once every fifty years.
e. The fifty-year flood cannot happen twice in the same year.
B
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If we are to follow nature's three scientific principles of sustainability (introduced in Module 1, p. 25-26), which should we start relying on more to meet our needs?
A. Renewable energy sources B. Nuclear energy C. Fossil Fuels D. Non-renewable energy sources
Why did the population of Jews in Europe drop from 9.5 million before World War II to less than 2 million today?
A) Their birth rates dropped as their urbanization rate increased, and the creation of Israel caused most to emigrate to the Middle East. B) The creation of Israel caused most Jews to emigrate from Europe to the Middle East. C) Nazis and their sympathizers murdered approximately six million Jews in the Holocaust. D) The vast majority of Jews emigrated to the United States. E) Their birth rates dropped as rates of urbanization increased.
Homo sapiens have inhabited Earth for fewer than 250,000 years
a. True b. False
What is a sea?
A) A semi-enclosed body of water B) An area where irregular waves peak due to wind C) A group of waves separated by wavelength D) None of these choices