How many separate sites of seismograph recordings are required to locate the center of an earthquake?
a. ?one
b. ?two
c. ?three
d. ?four
e. ?five
ANSWER: c
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Which of the following features is associated with a deep oceanic trench?
A. island arc B. linear island chain C. seamount D. mid-ocean ridge
The most widespread negative health impact of air pollution is the
A) destruction of the cellular components of the immune system. B) loss of the ability to absorb vital nutrients by the digestive system. C) disruption of the signaling processes of the endocrine system. D) chronic stress that weakens many systems of the body.
The U.S. has set aside a larger proportion of land area for biodiversity than any other country in the world.
Answer the following statement true (T) or false (F)
A solid has a solubility at room temperature of 78 grams per liter. If 1.0 L of a hot solution containing 100. g of solute is cooled to room temperature, how much solid is formed?
A. 78g/L B. 22 g C. 78 g D. 1 L E. 100 g