AP BIOLOGY

Detailed explanation-1: -Ocean salt primarily comes from rocks on land and openings in the seafloor. Salt in the ocean comes from two sources: runoff from the land and openings in the seafloor. Rocks on land are the major source of salts dissolved in seawater. Rainwater that falls on land is slightly acidic, so it erodes rocks.

Detailed explanation-2: -Cyclic salt is salt that is carried by the wind when it comes in contact with breaking waves. It is estimated that more than 300 million tons of cyclic salt is deposited on the Earth’s surface each year, and it is considered to be a significant factor in the chlorine content of the Earth’s river water.

Detailed explanation-3: -Rain water dissolves minerals and releases salts from the rocks on land, which are then carried down to the sea by rivers. As the sun warms the sea, water evaporates but the salt is left behind, making the sea even saltier.

Detailed explanation-4: -Final answer: we obtain salt from seawater by evaporation.