What technology, new in the late 19th century, increased the demand for copper worldwide?
A) The automobile
B) Cartridge style bullets
C) Electricity
D) Lead-free plumbing
C
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Europeans comprised more than 90 percent of immigrants to the United States during the nineteenth century, and even as recently as the early 1960s, still accounted for more than 50 percent
Indicate whether the statement is true or false.
Inversions aloft are associated with ________ air that characterizes centers of ________ air pressure
Fill in the blank(s) with correct word
Because ________ magmas are the most viscous, they are associated with the most violent eruptions.
A. water-rich B. carbon dioxide-rich C. silica-rich D. older E. iron-rich
What is the effective maximum range for carbon-14 dating?
A) 100,000 years B) 70,000 years C) 10,000 years D) 13,000 years