Round 11: Tossup 15

This substance can form diapiric structures which trap petroleum known as “domes” of it. The US Army Corps of Engineers builds a barrier sill in the Mississippi river during droughts to impede a “wedge” of this substance. This non-liquid substance partially drives the AMOC and SMOC along with heat in a so-called “global conveyor belt.” (*) Brackish (10[1])areas like estuaries have less of this substance than brine, which is over five percent this substance. A high proportion of this substance makes water denser, allowing humans to easily float on the Dead Sea. For 10 points, name this dissolved substance that distinguishes seawater from freshwater. ■END■

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Summary