States in which there is extensive karst topography include which of the following?
a. Ohio, Pennsylvania, Virginia, and West Virginia.
b. Florida, Kentucky, Tennessee, Indiana, and Missouri.
c. Minnesota, Iowa, Nebraska, and Kansas.
d. Wyoming, Arizona, Colorado, and Utah.
e. Michigan, New York, and Ohio.
Answer: b. Florida, Kentucky, Tennessee, Indiana, and Missouri.
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As a result of human activities, the present carbon dioxide level is Earth’s atmosphere is more than 30 percent higher than its highest level over the past 800,000 years.
Indicate whether the statement is true or false.
If you examine the changes in day-by-day electrical demand in the United States, the pronounced daily drop in electrical consumption is most closely associated with
A) people going to work.
B) people sleeping.
C) home heating and cooling systems.
D) daytime activities that consume little energy.
Why are plutonic rocks often called massive?
A) They often accumulate as successive layers, appearing banded. B) They are covered by the ocean. C) They are very large. D) They rarely accumulate as successive layers and as result look very different from sedimentary rocks.
At the point where a barometer reads 500 mb, approximately one half of the atmosphere lies below the barometer
Indicate whether the statement is true or false