The multicelled fauna of the Neoproterozoic is known from all continents except Antarctica, and
is collectively referred to as the ______________. Fill in the blank(s) with the appropriate word(s).
Ediacaran fauna
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Which of the following expands most when the temperature is lowered? Equal volumes of
A) iron. B) wood. C) helium. D) water at 4°C. E) None expand when the temperature is lowered.
How many electrons are gained or lost in the following half-reaction? C ? C-4
A) 2 electrons are lost B) 1/2 electron is gained C) 1/2 electron is lost D) 2 electrons are gained E) 4 electrons are gained
A concentration of minerals that could now be legally mined at a profit is called a
A) resource B) reserve C) mineral deposit D) metal
Which of the following is true of electrolytes?
A) All electrolytes have water as a solvent. B) All electrolytes contain cations and anions. C) both a and b D) neither a nor b