The salinity curve for low latitudes shows ________ salinity at ...

[Arii_bell]

The salinity curve for low latitudes shows ________ salinity at the surface and ________ salinity at depth.
 
  A) decreased, decreased
  B) decreased, increased
  C) increased, decreased
  D) increased, increased

Question 2

How is the carbonate compensation depth (CCD) related to the worldwide distribution of calcareous oozes?
 
  What will be an ideal response?

[meryzewe]

Answer to Question 1

C

Answer to Question 2

The destruction of calcium carbonate varies with depth. At the warmer surface and in the shallow parts of the ocean, seawater is generally saturated with calcium carbonate, so calcite does not dissolve. In the deep ocean, however, the colder water contains greater amounts of carbon dioxide, which forms carbonic acid and causes calcareous material to dissolve. The higher pressure at depth also helps speed the dissolution of calcium carbonate. The depth in the ocean at which the pressure is high enough, and the amount of carbon dioxide in deep-ocean waters is great enough, to begin dissolving calcium carbonate is called the lysocline. Below the lysocline, calcium carbonate dissolves at an increasing rate with increasing depth until the calcite compensation depth (CCD) is reached. At the CCD and greater depths, sediment does not usually contain much calcite.

[Arii_bell]

Excellent

[xthemafja]

Gracias!