Which of the following natural threats to human health is least predictable, meaning that there is usually the least amount of lead time before a disaster?
A) Earthquakes, tsunamis, and tornados
B) Forest fires
C) Hurricanes and floods
D) Severe snowstorms
A
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To increase the temperature of 1 gram of ice-cold ice to 80°C requires
A. 800 calories. B. 540 calories. C. 40 calories. D. none of the above
A keystone species
A) has a disproportionately large impact on the stability of an ecosystem. B) typically reduces overall biodiversity of an ecosystem. C) is typically an herbivore. D) is an example of amensalism.
In 1800, the core of the world-system was located in
A) North America. B) Japan. C) western Europe. D) the countries surrounding the Mediterranean. E) China.
A 2003 study reported that ________% of large-bodied fish and sharks were lost in the first decade of industrialized fishing
A) 20 B) 40 C) 90 D) 50 E) 10