Most metals, such as iron and copper, do not occur in a pure state in Earth's crust, but occur within ________
A) ores
B) sediments
C) igneous rocks
D) the O horizon of the soil
E) organic materials
A
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A ____________________ rock forms when a pre-existing rock is subjected to high temperatures, high pressures, chemically active fluids, or a combination of these agents.
Fill in the blank(s) with the appropriate word(s).
Quebec
A) is a French-speaking province of Canada which has failed to gain independence B) has long had an excellent relationship with the English majority in Canada C) is an independent political entity which separated from Canada in 1995 D) tends to be wealthier on average than the rest of English-speaking Canada E) is an English-speaking province of Canada
When considering both electron and H+ transport and the chemiosmotic pump, which of the following is the correct sequence of energy transformations?
A) chemical ? electrical ? mechanical B) chemical ? mechanical ? electrical C) electrical ? chemical ? mechanical D) electrical ? mechanical ? chemical
Which site on the island is the least dangerous?
A. the location of Rock 1 B. the location of Rock 3 C. the location of Rock 2 D. the area of the mudflow deposits E. the area of the landslide blocks