The atomic particle that carries a positive charge is called a(n) ________
Fill in the blank(s) with correct word
proton
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The problems associated with rapidly aging populations are today
A) primarily restricted to the rich countries of the world. B) primarily restricted to the poor countries of the world. C) equal throughout the world. D) of no consequence to the future of social security programs being paid by the young. E) more serious than the massive young population of the developing world.
In sunlight, nitrogen dioxide reacts with hydrocarbons and other gases to produce ____
A) weather elements B) surface ozone C) the ionosphere D) pollution
The Big Island of Hawaii is an example of a volcanic island associated with volcanic activity at a ________
A) hotspot B) island arc C) mid-ocean ridge D) transform fault E) deep sea trench
A recently recognized potential health hazard for coal miners is
A. pockets of gas that could result in explosion. B. mine subsidence. C. breathing of dust that could result in black lung disease. D. breathing radon that is radioactive which may increase the incidence of cancer.