Typically, a lightning flash will have ____ leaders, each followed by a return stroke
a. one or two
b. two or three
c. three or four
d. four or five
e. five or six
ANSWER: c
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Rising and falling air currents, winds, and concentrations of CO2 and other greenhouse gases in the ____ play major roles in the planet's short-term weather and long-term climate.
A. troposphere B. thermosphere C. mesosphere D. stratosphere E. tropopause
Based on both percentage of world population and annual stream flows, what can be deduced from this table
One measurement that is widely used to determine how far the focus of an earthquake is from the seismograph where it is recorded is ________
A) the amplitude of the S-wave B) the amplitude of the P-wave C) the difference in travel time between the P and the S wave D) the difference in amplitude between the P and the S wave
Foliated metamorphic rocks can form from both regional and contact metamorphism.?
a. True
b. False
Indicate whether the statement is true or false