What has happened to the 18O/16O over the past 200 years?
A. Stayed the same
B. Increased a little
C. Decreased a little
Answer: C
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Which section of a stream is characterized by the absence of fish and found downstream from the release of oxygen-demanding wastes and heat?
A. clean zone B. decomposition zone C. septic zone D. recovery zone E. dead zone
Of the following rocks, the one that does not originate in sediments laid down by water, wind, or ice is
A. marble. B. shale. C. sandstone. D. conglomerate.
Why did scientists reject Wegener's idea about how continents moved from Pangea to their present locations?
A) Scientists did not believe in a fluid mantle. B) Scientists did not believe in uplift of continents from the ocean floor. C) Scientists did not believe that the continental lithosphere could be stronger than the oceanic lithosphere. D) Scientists were not convinced by his puzzle-like matching of continents into Pangea.
If the tidal current is maximum at mid tide level, the tide is a progressive wave type.
Answer the following statement true (T) or false (F)