Liquefied natural gas is formed
A. on the surface of oil deposits.
B. by volatilizing hydrocarbons in gasoline.
C. by subjecting natural gas to -162°C.
D. None of these are correct.
Answer: C
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The major difference between intrusive igneous rocks and extrusive igneous rocks is
A. type of minerals B. chemical composition C. whether they solidify beneath or on the Earth's surface D. all of the preceding
Answer the following statement(s) true (T) or false (F)
1. The crude birth rate minus the crude death rate equals the rate of natural population increase or decrease. 2. Immigration or emigration can change the population of a country despite natural increase. 3. All nations have their own state. 4. In Asia and Africa, illiteracy among women is still much higher than among men.
Which of the following best matches the description?Type of reactor that uses special water that contains the hydrogen isotope, deuterium, as moderator and coolant water.
A. rem B. thermal pollution C. nuclear breeder reactor D. U-235 E. gamma radiation F. transuranic waste G. radiation H. alpha radiation I. decommissioning J. moderator K. light-water reactor L. nuclear fusion M. nuclear fission N. heavy-water reactor O. beta radiation P. radioactive half-life
Cyanobacteria are blue-green algae. Indicate whether the statement is true or false