Building and farming on a flood plain decreases the land's ability to absorb flood waters.
Indicate whether the statement is true or false.
Answer: True.
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Iron atoms, Fe, are better reducing agents than copper ions, Cu2+. In which direction do electrons flow when an iron nail is submerged in a solution of Cu2+ ions?
A. Electrons cannot flow from the nail to the Cu2+ ions because there is no conductor between the two. B. The electrons flow from the copper ions in solution to the submerged nail. C. The electrons flow from the submerged nail to the copper ions in solution. D. The electrons flow from the positive charge on the nail to the negative charge on the nail.
How old is the idea that the whole world should be divided into countries?
A) It dates from the beginning of human history. B) It began when the first civilizations arose in Mesopotamia. C) It started in the Roman Empire. D) It has developed over the last two hundred years or so.
Repeatability in an experiment is important because
A. independent investigators must be able to get the same results. B. only independent investigators must be able to get the same results and it helps to support the initial hypothesis. C. it helps to support the initial hypothesis. D. it eliminates bias. E. All of these are correct.
The integration of Middle East and North African states into the global economy generated all of the following results, except:
A) internal migration to rural areas B) cuts to social programs C) lowered living standards D) international aid money E) none of the above