What has been attributed to the deadly viral epidemic among dolphins in the western Mediterranean?
a. DDT
b. Refined oil spills
c. PCBs
d. CFCs
ANS: C
Polychlorinated biphenyls are another type of chlorinated hydrocarbon. The ingestion of the chemical
by these dolphins is thought to have weakened their immune system which allowed for a virus to
infiltrate them. Information can be found in the section Marine Pollutants May Be Natural or Human
Generated.
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Volcanoes with alternate layers of lava and pyroclasts (ash and solid materials) are called:
a) Shield volcanoes b) Stratovolcanoes (or composite volcanoes) c) Cinder cones (or scoria cones) d) Mud volcanoes e) Lava domes
Choose appropriate way(s) that hot springs might impact people living nearby
A. increases likelihood of earthquakes. B. provides geothermal power. C. enables easy transportation of goods.
A major part of the greenhouse effect is that it involves the absorption of the earth's outgoing radiation by atmospheric gases. Along with carbon dioxide, what atmospheric component is largely responsible for this process?
A) water vapor B) nitrogen C) oxygen D) nitrous oxide
The albedo of snow is generally low, while that of an evergreen forest is relatively high
a. True b. False Indicate whether the statement is true or false