Multiple Choice
Which of the following is true of the chemical composition of seawater?
A) Eighteen elements account for 75% of the dissolved waters in seawater.
B) Seawater contains dissolved gases, suspended and dissolved organic matter, and many trace elements.
C) Seawater is very heterogeneous, varying across the vast oceans of the world.
D) Samples of ancient seawater suggest a great deal of chemical variation over the Earth's history.
Correct Answer:

Verified
Correct Answer:
Verified
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