Match the words in the left-hand column to the appropriate blank in the sentences in the right-hand column. Use each word only once.
sedimentary rock, hot spot, seafloor spreading, subduction, seafloor crust, fault
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A major motivation for colonization of the continent of Africa was the lucrative opportunities in the slave trade there
Indicate whether the statement is true or false
The word "frontogenesis" on a weather map would mean that
a. a front is in the process of dissipating. b. one front is about to overtake another front. c. a front is regenerating or strengthening. d. severe thunderstorms will form along a front. e. a front is approaching.
During a normal summer day in the Midwest, ____
a. highest temperatures will occur around noon b. the relative humidity curve will be more or less parallel to the temperature curve c. air temperature and dew point temperature will be the same d. the absolute humidity tends to be high
How is atmospheric nitrogen converted to a usable form in the biosphere?
A) Atmospheric nitrogen is directly available to plants and animals. B) Atmospheric nitrogen is completely unavailable to plants and animals and, as a result, synthetic fertilizers must be used. C) Bacteria within root nodules of legumes chemically combine the atmospheric nitrogen into nitrates and ammonia. D) It is absorbed into plants via stomata and converted within the plant to a usable form.