For a neutrally-charged atom to become a positively-charged ion of the same element it must
a. lose a proton.
b. lose an electron.
c. gain a proton.
d. gain an electron.
e. b and c
B
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The best explanation for the third internal voluntary migration wave in the United States is
A) the pursuit of greater economic opportunity. B) the high degree of racism in the United States. C) the environmental problems in large cities. D) the romantic longing for a simple country life.
What type of stream is shown in this photograph?
A) Meandering stream
B) Braided stream
C) A stream whose main channel has high sinuosity
D) An esker
Global warming is caused in large part by the use of nuclear energy
a. True b. False
?The CO2we emit typically remains in the atmosphere for only about 1-3 weeks on average.
Answer the following statement true (T) or false (F)