What source region dominated migration to the United States in the nineteenth century?

A) Latin America
B) Asia
C) Europe
D) Africa
E) North Africa and Southwest Asia


Answer: C

Environmental & Atmospheric Sciences

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At midlatitudes in spring, a phytoplankton bloom is often preceded by ________.

A. vertical mixing becoming shallower than the critical depth B. vertical mixing exceeding the critical depth C. the critical depth being equal to the compensation depth D. the critical depth becoming shallower than the thermocline

Environmental & Atmospheric Sciences

The chemical formula of rust is Fe2O3. Which of the following is the correct systematic name for this compound?

A) iron oxide B) iron(II) oxide C) iron(III) oxide D) diiron trioxide

Environmental & Atmospheric Sciences

Which of the following is true of all multi-step reactions?

A) They involve more than two reactant molecules. B) They are endothermic. C) they are exothermic. D) The rate of reaction is determined by the slowest step.

Environmental & Atmospheric Sciences

The population growth curve is ____________ when a population encounters environmental resistance. Fill in the blank(s) with the appropriate word(s)

Environmental & Atmospheric Sciences