Federal mineral-resource laws of the late nineteenth century were designed to preserve mineral resources by restricting exploitation.
Answer the following statement true (T) or false (F)
False
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What percentage of Americans over the age of 6 have trace levels of BPA in their bodies?
a. 93% b. 95% c. 90% d. 83% e. This applies to citizens of other developed countries, but not America.
The arctic front
A) is relatively shallow. B) produces substantial amounts of snowfall. C) never penetrates further south than central Canada. D) does not produce a temperature difference when it passes an area.
Which statement about ozone thinning is true?
A. Ozone thinning is confined to the atmosphere over Antarctica. B. Ozone levels fluctuate seasonally, with the lowest levels occurring in September and October. C. Ozone thinning is irreversible since there are no substitutes for CFCs. D. An international agreement to halt ozone thinning has yet to take place. E. Ozone thinning only affects organisms living in polar regions.
The Glomar Challenger proved ________
A) the Earth is round B) the poles reverse their polarities C) the seafloors are spreading D) continental drift has stopped E) mountains exist under the sea