The single major source for photochemical reactants in the United States are
A) steel mills and the agricultural industry.
B) automobiles.
C) electrical generation stations.
D) rapid transit, buses, and excessive use of light rail systems.
B
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What is not true of a mixture?
a. A mixture is different substances closely intermingled. b. A mixture is able to maintain separate properties. c. A mixture is able to disperse homogenously. d. A mixture may have varying concentrations and properties throughout.
Cooler, older, oceanic lithosphere sinks into the mantle at ________
A) subduction zones along convergent plate boundaries B) transform fault zones along divergent plate boundaries C) rift zones along oceanic ridges D) sites of long-lived, hot spot volcanism in the ocean basins
With diameters of ____ or less, polar lows are generally smaller in size than their mid-latitude cousins.?
a. ?10,000 to 5000 km b. ?1000 cm to 10 m c. ?1000 to 500 km d. ?1 to 5 km e. ?5 to 1 km
What mineral test is shown in this photograph?
A. streak B. specific gravity C. scratch test D. effervescence E. magnetism