If the concentration of carbon dioxide in the atmosphere increases, Earth's average global temperature will
A) increase.
B) decrease.
C) stay the same.
D) fluctuate wildly.
A
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The ocean current that gives Europe a warmer climate than other parts of the world at the same latitude is the
A. Labrador Current B. Spanish Current C. British Current D. North Atlantic Drift
The "ionosphere" is so designated because:
A) satellites have a difficult time flying through it. B) visible sunlight is deflected by it. C) of the electrical charges of atoms associated with it. D) no radio waves can pass through it.
In toxicology studies, the threshold level of a chemical is the dose of the chemical ________
A) above which at least 50% of the organisms being tested died B) below which there is a measurable decline in the health of the organism being tested C) below which at least 50% of the organisms being tested died D) above which there is a measurable decline in the health of the organism being tested
An air mass from the Gulf of Mexico that moves northward over the U.S. in winter would be labeled:
A) mTw. B) mPw. C) cTk. D) cTw. E) mTk.