from where does salt come in the sea.
http://www.palomar.edu/oceanography/salty_ocean.htm
Salt in the sea primarily comes from a process called "weathering." Allow me to explain further:
1. Weathering: The Earth's crust is composed of rocks and minerals, and over time, these rocks undergo weathering. Weathering occurs due to various factors such as wind, water, ice, temperature changes, and biological processes.
2. Erosion: When rocks undergo weathering, they break down into smaller pieces through a process called erosion. This can occur through physical (e.g., wind, water currents) or chemical (e.g., acid rain) means.
3. Transport: The eroded rock fragments, including minerals like salt, are then transported by water, primarily rivers, to the oceans. As the water from rivers flows into the sea, it carries with it dissolved minerals, including salt.
4. Dissolution: Once the minerals reach the sea, they continue to dissolve in the ocean water. Salt, primarily sodium chloride (NaCl), is one of the minerals that readily dissolves in water, contributing to the saltiness of the sea.
5. Evaporation: The water in the ocean is continuously exposed to the energy from the sun, resulting in evaporation. As the water evaporates, the dissolved salt remains behind, gradually increasing the salt content in the sea over time.
It is worth noting that the salt water in the sea is not getting saltier indefinitely because there is a balance between the input of salt from various sources and the output of salt through processes like evaporation, precipitation, and ocean currents.