Why was it difficult to accurately count the number of European immigrants to the U.S between 1840 and 1910?
A) European immigrants didn't have the correct documents.
B) Ellis Island had to process too many people at a time.
C) Europe experienced frequent boundary changes.
D) Many didn't stay very long.
E) They didn't have computers back then.
Answer: C
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Which of the following has the greatest number of nonbonding pairs of electrons ?
A. He B. S C. H D. F E. C
If air were a better conductor than it is, at nighttime the earth would be
A) considerably colder. B) considerably warmer. C) not appreciably different in temperature.
Identify the four seawater constituents that are present in the highest concentration.
A. sodium B. potassium C. sulfate D. bromide E. chloride F. magnesium G. calcium
Which of the following processes is probably involved in the formation of the landscape shown in this photograph from the Connections two-page spread?
A. spheroidal weathering B. fracturing of an igneous rock, probably granite C. physical weathering D. chemical weathering E. All of these choices are correct.