Sources of the oceans' salts are believed to include:
a. the early atmosphere of the earth
b. all of these choices
c. the earth's crust.
d. volcanic eruptions.
b
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Typical weather in Los Angeles, California is sunny and warm during the day. A major concern for people who live there is asthma and bronchitis from photochemical smog.
Answer the following statement true (T) or false (F)
____________ is the state of the atmosphere at a specific time and place; ____________ is the long-term
statistical sum of the atmospheric conditions in an area. Fill in the blank(s) with the appropriate word(s).
The large number of individual languages documented in Africa has resulted primarily from
A) thousands of years of isolation between cultural groups. B) repeated invasions by outsiders. C) introduction of many different languages by the colonial powers. D) frequent migration by the different tribal groups. E) colonial administration of native lands.
Tornadoes preferentially kill all but which of the following?
A. mobile-home residents B. those unaware of broadcast tornado alerts C. teenagers D. old people E. occupants of exterior rooms with windows