Craton is a long-lived block of durable continental crust commonly found at the edge of a stable continent.
a. true
b. false
Answer: b. false
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Under the household responsibility system, Chinese farmers
A. decide what crops to grow, beyond a contracted amount of grain to the government B. home-school their children C. leave the Communist party D. none of the choices are correct
Which of the following surface environments is the most likely site for deposits in this photograph?
A. sand dunes B. lake C. glacier D. steep mountain front E. beach
Otto Hahn and Fritz Strassmann discovered fission by bombarding uranium with neutrons. Their discovery was made possible by finding one of the fission products, barium (Ba, atomic no. = 56). What is a reasonable explanation for why they were unable to initially observe the other product, krypton (Kr, atomic no. = 36)?
A. The isotope of krypton generated might have a short half-life and had undergone radioactive decay to some other element. B. Krypton is a noble gas and therefore chemically unreactive, making it difficult to characterize by chemical means. C. Krypton is a noble gas and it may have diffused out of the sample. D. both A and B E. all of the above
A banana is produced in one country, where it is grown using a pesticide that is banned in a second country. If it is shipped to the second country with some residue of the pesticide still remaining, then that would be an example of the____________________.
Fill in the blank(s) with the appropriate word(s).