Here's how it works:
1. Rainwater: As rainwater falls, it becomes slightly acidic due to dissolved carbon dioxide from the atmosphere.
2. Weathering: This acidic rainwater reacts with rocks on land, breaking them down into smaller particles and dissolving minerals.
3. Erosion: These dissolved minerals are carried by rivers and streams to the ocean.
4. Ocean Accumulation: Over millions of years, the dissolved minerals accumulate in the ocean, increasing salinity.
Other sources of dissolved salts in the ocean include:
* Hydrothermal vents: These underwater volcanic vents release dissolved minerals from the Earth's interior.
* Volcanic eruptions: Volcanic eruptions can release gases and particles into the atmosphere, which can eventually settle in the ocean and contribute to salinity.
While these other sources contribute to the overall salinity of the ocean, weathering and erosion of rocks on land are the primary sources of dissolved salts.
