The Mercalli earthquake intensity scale uses Roman numerals from I to XII, XII being the highest intensity.
a. true
b. false
Ans: a. true
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Most demographers and policy makers think that the best way to control population is to
A) hold annual conferences hosted by the UN. B) educate women and give them equal status with men. C) increase the power of religious institutions that preach abstinence and celibacy. D) pass laws that limit families to one child. E) let HIV/AIDs, tropical diseases, plagues and epidemics run freely.
Soil horizons are vertical cracks through which water enters the soil
Indicate whether the statement is true or false.
Approximately 40 grams of the radioisotope iodine-131 were accidentally released into the atmosphere during the Fukushima nuclear accident. The half-life of iodine-131 is 8 days. How long would it take for there to be 10 grams of iodine-131 left in the
environment? A) 8 days B) 12 days C) 14 days D) 16 days E) 23.7 days
If an organism is described as 'benthic," where does it reside?
A. At the bottom of the ocean or a lake B. At the bottom of the ocean only C. In a cave D. At the bottom of a lake only