Figure 10A-6 shows the Gulf of Mexico and the lower North Atlantic, and Figure 10A-5 displays the higher-latitude North Atlantic. Patterns of high SSTs delineate the Gulf Stream. The plotted numbers...

Figure 10A-6 shows the Gulf of Mexico and the lower North Atlantic, and Figure 10A-5 displays the higher-latitude North Atlantic. Patterns of high SSTs delineate the Gulf Stream. The plotted numbers indicate SST values in degrees Fahrenheit and the thinly drawn curves mark water-mass boundaries. The Gulf Stream is the relatively narrow, irregular ribbon of warm surface water that curves from Florida into the North Atlantic Ocean. The Gulf Stream’s northern boundary extends northward along Florida’s eastern coast before turning northeastward beyond North Carolina’s Cape Hatteras in Figure 10A-6. It then extends generally eastward. The Gulf Stream’s southern boundary initially appears east of the Gulf Stream to the east of central Florida. It turns northeastward, roughly paralleling the northern boundary.
The highest SSTs in the Gulf Stream from east of Florida to the Carolinas is ______°F. The SSTs show the Gulf Stream is warmer than the shelf water between it and the coast and Sargasso Sea waters to the east.
a.73
b.78
c.80

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