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

Question

Quizplus · Accepted Answer

Seawater contains dissolved gases, suspended, and dissolved organic matter, as well as many trace elements. This is due to the fact that seawater is in constant contact with the atmosphere and the land, leading to a diverse chemical composition. The other options are incorrect as ancient seawater shows relatively stable chemical composition (A), seawater is generally homogeneous throughout the world's oceans (B), and more than 18 elements are required to account for 75% of dissolved salts in seawater (D).

Which of the Following Is TRUE of the Chemical Composition