In order for a particular type of material to be classified as a mineral, it must ________.
A. be a solid
B. have a crystalline structure
C. have a definite chemical composition
D. occur naturally
E. All of the answers are correct.
Answer: E
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Which of the following best matches the description?Pollutants produced by the interaction of primary pollutants with other molecules or an energy source.
A. primary air pollutants B. particulates C. radon D. photochemical smog E. acid deposition F. ozone G. greenhouse effect H. sulfur dioxide I. thermal inversion J. oxides of nitrogen K. secondary air pollutants
Radiometric dating techniques allow geologists to place events in sequence without knowing
their exact ages. Indicate whether the statement is true or false.
Which one of the following statements is INCORRECT?
A) The higher the GDP of a country, the more equal its income distribution.
B) The primary sector accounts for a larger share of GDP for LDCs than MDCs.
C) Workers in MDCs are more productive than those in LDCs.
D) The HDI is a function of economics, social, and demographic indicators.
E) PPP accounts for differences in cost among countries for the same basket of goods.
The Green Revolution was so successful because it allowed small-scale farming to take a major role in crop production
Indicate whether the statement is true or false