Climatologists warn of a tipping point when global temperatures trigger unavoidable catastrophic events and sea levels rise more than 25 feet. What single event would cause the sea level to rise that much?
A) Increased precipitation over the continents
B) Melting of the Greenland Ice Sheet
C) Thermal expansion of the oceans
D) Melting of the polar ice caps
B
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Electromagnetic radiation
A) consists of waves that can vary in amplitude. B) is relatively rare in the universe. C) consists of two waves that are 90 degrees out of phase with each other. D) does not create an electric field.
What makes light absorption in diatoms more effective than just using chlorophyll?
A) Surface-to-volume B) Microbial loop C) Frustule perforations D) Accessory pigments
The rerouting of the Mississippi to increase the efficiency of movements of steamboats and barges was the result of the
A) Industrial Revolution. B) Medical Revolution. C) Green Revolution. D) Environmental Revolution.
In which of the following areas would one likely find Aridisols?
A) northern Europe B) the selva in Brazil C) the U.S. southwest D) marine west coast climates