Scientists studying the Florida Everglades have found that between 2003 and 2011, there was a 99 percent decrease in raccoons, a 98 percent drop in opossums, a 94 percent drop in white-tailed deer, an 87 percent decrease in bobcats, and no rabbits or foxes were observed. Which has caused the collapse of mammals in this ecosystem?
A. pythons
B. alligators
C. hurricanes
D. pollution
Answer: A
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A. The land flexes upward due to isostatic rebound. B. The land surface remains unchanged but seems lower because of the loss of ice. C. The land rises because the rocks are warmer without the ice. D. It subsides because there is less ice on top.
Which name applies to states in the Midwest part of the U.S. that experience huge topsoil losses in the 1930s?
A. Dust Bowl B. Rose Bowl C. Dust Bin D. Dirty Devil
Which of the following factors distinguishes severe thunderstorms from ordinary thunderstorms?
A. Severe thunderstorms contain hail. B. Severe thunderstorms have a strong updraft and downdraft. C. Severe thunderstorms have a tilted updraft in the mature stage. D. Severe thunderstorms have an anvil-shaped cloud.
?The sun's heat and ultraviolet (UV) rays can kill infectious microbes in water in clear plastic bottles.
Answer the following statement true (T) or false (F)