Ordinary thunderstorms only last about one hour and begin to dissipate when:a
lightning neutralizes all the electrical charge in the cloud
b. when all the precipitation particles in the cloud turn to ice
c. when the downdraft spreads throughout the cloud and cuts off the updraft
d. when solar heating at the ground begins to decrease
c
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Which of the following describes the mixing ratio?
A. It changes with temperature. B. It is expressed in grams of water vapour per kilogram of dry air. C. It increases with the increase of a given volume of air. D. It is a relative measure of water vapour.
The rock cycle is fueled both by the hydrologic cycle and the tectonic cycle
Indicate whether the statement is true or false
Active volcanoes today in Oregon and Washington, including Mt. St. Helens, result from ________.
A. spreading of the Juan de Fuca Ridge B. the subduction of the Pacific Plate beneath North America C. heat generated by friction on the San Andreas Fault D. the subduction of the Juan de Fuca Plate beneath North America E. continent-continent collision
What did the United States do in the early 1970s to resolve the disparity between oil production and consumption? What events caused the sudden oil shortages of the mid 1970s and then the return to abundant, but more expensive, supplies?
What will be an ideal response?