Near Earth's surface, ____ occupies about 78% and ____ about 21% of the total volume of dry air
A) nitrogen; oxygen
B) hydrogen; oxygen
C) oxygen; hydrogen
D) nitrogen; water vapor
A
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Freezing rain is likely to occur in this sequence when a warm front passes
A) freezing rain, snow, rain, sleet. B) rain, freezing rain, sleet, snow. C) snow, freezing rain, rain, sleet. D) snow, sleet, freezing rain, rain.
Which region is not considered to be a region where cyclogenesis often occurs:a
eastern slopes of the Rocky Mountains. b. Atlantic Ocean near Cape Hatteras, North Carolina. c. California. d. the Great Basin of the United States. e. Gulf of Mexico.
African Americans migrated out of the American South as a consequence of
A) the removal of travel visa requirements for people of color. B) increased farm mechanization leading to a decreased demand for farm labor. C) the development of better highways, allowing for rapid and efficient travel. D) increasing opportunities to work in northern coal mines and the California gold rush. E) All of these were factors influencing the migration.
Rock folds typically form under the influence of compressive stress
Indicate whether the statement is true or false