North-flowing winds along the West Coast of North America produce ____, which has no direct effect on climate or productivity
A) ?upwelling
B) ?diverging currents
C) ?downwelling
D) ?converging currents
C
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Earthquake damage occurs when
A) stress exceeds strain of materials. B) stress exceeds strength of materials. C) strain exceeds strength of materials. D) strength exceeds strain of materials.
________ deposits are the result of sedimentary concentration of heavy minerals in streams
Fill in the blank(s) with correct word
Over the last two decades, global average surface temperatures have risen about __ degrees Celsius
A) .5 B) 1.2 C) 1.9 D) 2.4 E) 2.9
There is a scientific consensus that climate change is occurring, and many believe that human factors are contributing to it. What is the greenhouse gas most commonly associated with the burning of fossil fuels?
A) carbon dioxide (CO2) B) dihydrogen oxide (H2O) C) dioxin (C4H4O2) D) nitrous oxide (NO2) E) sulfuric oxides (SO3 and SO4)