Question

PLEASE HURRY!! 15 POINTS

Earth's oceans contain many dissolved elements like calcium, sodium, and chlorine. These elements plus several others combine to form the salts in the oceans.

What is a major source of calcium and sodium in oceans?
A) air pollutants

B) gases from active volcanoes
Eliminate

C) minerals dissolved in aquifers

D) weathering and erosion of rocks

Answer 1

Hello There!

A major source of calcium and sodium in oceans is weathering and erosion of rocks.

Option D.

Hope This Helps You!
Good Luck :) 

- Hannah ❤

Answer 2

The right answer is D) weathering and erosion of rocks.

Sodium (Na) exists mainly in the oceans in the form of sodium chloride NaCl. This salt is derived from mines or saline rocks, by erosion of rock evaporite salt called rock salt or halite.

Calcium (Ca) exists mainly in the form of limestones, which are sedimentary rocks, just like sandstones or gypsums, easily soluble in water (see karst), composed mainly of calcium carbonate CaCO3, but also magnesium carbonate MgCO3.