How many times a day are radiosondes launched for upper-air data?
A) once
B) twice
C) three
D) four
Answer: B
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The father of modern genetics is Alfred Wallace
Indicate whether the statement is true or false
Air pollution is
A) a form of photochemical smog. B) gaseous sulfur and phosphorus. C) a concentration of a trace substance at a level greater than occurs in average air. D) a concentration of a trace substance at a level greater than one percent. E) concentrated in tropical regions.
The accompanying graph shows the number of violent tornados in the last 60 years. Based on when most global warming has occurred, one would conclude
A. global warming has had a major impact on the number of tornados. B. global warming has not had an impact on the number of tornados. C. global warming has had a major impact on the number of tornados in the early part of the century. D. global warming has had a major impact on the number of tornados since 2000.
During the early Paleozoic era, the continent of Gondwanaland included North and South America
Indicate whether the statement is true or false