When food is irradiated with gamma rays from a cobalt-60 source, does the food become radioactive? Why?
A) Yes. This is why irradiation with cobalt-60 is no longer approved by the FDA.
B) Yes. However, the radioactivity resulting is well below the danger level established by the FDA.
C) No. The gamma rays do not have sufficient energy to initiate the nuclear reaction in the atoms of the food.
D) Yes and No. Although the gamma rays initiate the nuclear reaction the radioactivity does not show up until the food is ingested.
C
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Public housing
A) has kept pace with demand. B) is only necessary in developing nations. C) as high-rise concentrated living was successful in both Chicago and St. Louis. D) demand outpaces supply. E) is only found on an urban periphery.
The synthesis of a large collection of information that contains well-tested and verified hypotheses about certain aspects of the world is known as a scientific
A) fact. B) hypothesis. C) law or principle. D) theory. E) none of the above
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A) Equatorial (0 to 5 degrees) B) 5 to 30 degrees C) 30 degrees D) 30 to 60 degrees E) 60 degrees F) 60 to 90 degrees G) Poles (90 degrees)