Which of the following is not the name of a supercontinent?
A) Gondwana
B) Laurasia
C) Pangaea
D) Rodinia
E) Tethys
E) Tethys
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Scientists recognize three levels of extinction. Identify and briefly explain each of these. How seriously does each of the levels affect the earth's biodiversity?
What will be an ideal response?
________ focus earthquakes are the most common.
A. Intermediate B. Deep C. Hypocenter D. Shallow E. All depths are equally represented.
Over the past 50 years, global life expectancy has
A) decreased by about 5 years primarily due to increases in viral infections. B) stayed about the same due to new diseases spread by global climate change. C) increased by about 5 years due to the development of many poor nations. D) increased by more than 20 years due to better health care and nutrition worldwide.
Winds at high latitudes are out of the
A. north. B. east. C. west. D. south.