What is the current regulatory standard for gasoline mileage of automobiles in the United States?
A) 30.5 miles per gallon
B) 22 miles per gallon
C) 33 miles per gallon
D) 27.5 miles per gallon
E) 35 miles per gallon
D
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In the last 20 years geologists have begun measuring accumulation of Helium (He) in some minerals because these minerals can retain He at temperatures up 100-200°C. The "date" gives a time when the material cooled below the temperature where the helium began to be retained, which is related to the depth of the material. Where do you think the He comes from that allows this technique to work?
A) alpha decay of some radioactive element B) beta decay of some radioactive element C) the sun D) the atmosphere, like carbon-14
Sea Surface Temperatures (SST's) are typically warmest
A. north of the Tropics in both hemispheres. B. on the western sides of oceans. C. on the eastern side of oceans. D. along the axis of the Atlantic Ocean and Pacific Oceans.
The Rio Grande Rift is an example of a/an __________ zone. Fill in the blank(s) with the appropriate word(s)
The Maldive Islands are in immediate danger from global climate change because
A) the coral reefs, which are their major tourist attraction, are dying. B) the islands have a mean elevation of three feet above sea level. C) the islands are constantly damaged by hurricanes generated by warmer sea water. D) increased rainfall has flooded much of the agricultural land.