To reduce auto emissions in the United States, modifications to automobile engines have been required since the 1960s
Indicate whether the statement is true or false.
Answer: TRUE
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Zinc, Zn, is more easily oxidized than copper, Cu. What happens the moment after metal strips of these metals come into contact with each other?
A. The surface of the copper appears moist and cloudy as the zinc metal oxidizes and gets dissolved into Zn(aq) ions. B. The zinc metal begins to turn a greenish color indicating the presence of the formation of cupric oxide, CuO. C. The zinc metal immediately begins depositing electrons onto the surface of the copper, thus coating the copper with a white powder of zinc oxide, ZnO. D. Nothing happens. An immediate buildup of charge in either material prevents continued oxidation-reduction from occurring.
The European colonial power that still maintains close economic ties to its former colonies in Africa is:
A. Italy. B. France. C. Denmark. D. Poland.
What is rarely a limiting factor for marine organisims?
A) Salinity B) pH C) Hydrostatic pressure D) Nitrogen
As distance from the equator increases, seasonal variation in temperature tends to
A) increase. B) decrease. C) remain constant.