Secondary extraction of petroleum ________
A) uses solvents, water, or steam
B) allows the oil to be extracted to the last drop
C) occurs immediately after primary extraction
D) is less expensive than primary extraction
E) causes less environmental damage than tertiary extraction
A
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In 2008, Israel had a population of 7.5 million and Mexico had a population of 107 million. Both had a rate of natural increase (RNI) of 1.6. This means that
A) Israel's population will double more quickly than Mexico's. B) Mexico's population will double more quickly than Ecuador's. C) Israel's and Mexico's populations will double in the same amount of time. D) Israel's and Mexico's populations will never double with such a low RNI.
When a hydronium ion concentration equals 1 × 10-4 moles per liter, what is the pH of the solution? Is the solution acidic or basic?
A) The pH is of this solution is 4 and it is acidic. B) The pH is of this solution is 8 and it is basic. C) The pH is of this solution is 6 and it is acidic. D) The pH is of this solution is 10 and it is basic.
The appearance of a downdraft marks the end of the mature stage of a thunderstorm
a. true b. false
The process by which surface waters that are swept from the coast and are replaced by cool, nutrient-rich water from great depths is known as
A) upwelling. B) ENSO. C) thermohaline circulation. D) Ekman transport. E) Walker circulation.