Sometimes there is only one lightning stroke, but more often the leader-and-stroke process is repeated in the same ionized channel at intervals of about four-hundredths of a second. The subsequent leader, called a ____________________ proceeds from the cloud along the same channel as the original stepped leader; however, it proceeds downward more quickly because the electrical resistance of the
path is now lower.
Fill in the blank with correct word.
ANSWER: dart leader
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Divergence and diffluence
A) are vastly different. B) are complimentary. C) cannot coexist. D) are confusing to most forecasters.
The artificial method of fixing atmospheric nitrogen for plant growth is called the ________
A) net primary production B) denitrification process C) nitrification process D) Haber-Bosch process
During December solstice the
A. entire area poleward of the Tropic of Capricorn remains out of sunlight. B. entire area poleward of the Antarctic Circle remains out of sunlight. C. entire area poleward of the Arctic Circle remains out of sunlight. D. entire area poleward of the Tropic of Cancer remains out of sunlight.
Mechanically formed sedimentary rocks are those formed from ________
A) magma B) granite C) pieces of other rocks D) silt E) oxygen