The early Paleozoic history of continents involves ____
a. widespread glaciation
b. stable plate positions
c. mountain building and marine transitions/regression.
d. extensive volcanism
e. subduction and emplacement of batholiths
c
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From the 1930s to the 1950s, an X-ray machine called a shoe-fitting fluoroscope was common in shoe stores
People would try on shoes, stand with their feet in the machine, and allow the salesperson to view live images of the bones of their feet in the shoes! Sometimes the salesperson would reach down and adjust the person's shoes for a better image. These machines used X-rays and exposed the feet of customers to 5 to 30 seconds of radiation. Further, lower doses of radiation exposure also occurred within about 10 to 15 inches of the outside of the machine. If you were looking for medical problems resulting from the use of these fluoroscopes in shoe stores, where would you expect the greatest harm? A) customers who had their feet exposed to the X-ray device B) the salespeople who operated the machine to sell shoes C) salespeople who worked in nearby stores D) the salesperson who worked behind the cash register in the store
As one approaches the equator, the Sun angle ________ and the atmosphere attenuation ________.
A) increases; increases B) decreases; decreases C) increases; decreases D) decreases; increases
When an automobile with the windows rolled up becomes heated in bright sunlight, the glass in the car functions most like
A) rain in the atmosphere. B) clouds in the atmosphere. C) sulfate aerosol in the atmosphere. D) carbon dioxide in the atmosphere.
Opposition to the use of GMOs is strong in the countries of Africa. What are the key factors that contribute to this resistance?
What will be an ideal response?