What is indicated by a gasoline's octane rating?
A. the degree at which the compound ignites
B. the degree of branching in the gasoline hydrocarbons
C. the percentage of octane in the mixture
D. a measure of how many degrees it takes to ignite a mixture of octane
E. none of the above
Answer: B
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What is the elevation at the bottom of the depression southwest of Pine Hill?
The question is based on this contour line map with elevations shown in feet.
• North is to the top of the map.
• Streams are shown with dashed lines.
• A graphic scale for measuring horizontal distances is shown below the map.
• Estimate elevations between contour lines to the nearest half-contour interval; assume that the top of a
hill is one-half-contour interval higher than the highest contour line shown.
What will be an ideal response?
If you drilled into an oceanic plateau, you would most likely find
A) a thin layer of oceanic sediment over continental crust. B) andesitic volcanoes buried by turbidity currents. C) a normal thickness of oceanic crust overlain by andesitic volcanoes. D) large amounts of basalt derived from melting in the mantle.
The global ________ involves the transfer of water between Earth's water reservoirs
Fill in the blank(s) with correct word
If fishing demands continue at the current rate, by which year will the world's major fisheries collapse?
A. 2100 B. 2050 C. 2125 D. 2075