Why is the sea water so salty? 🌊 Solve the answer with a simple physics that many people overlook.
Have you ever wondered? 🤔 The rainwater is fresh, the water in the river is fresh, but when it flows into the sea together, it is salty. Why?
The secret is simple physics. 👇
• Rain erodes rocks, melting minerals into ions (sodium + chloride = salt)
• Rivers constantly bring salt to the sea for billions of years.
• The real hero is "evaporation" - the sun can only carry the water, and the salt is too heavy, it can't evaporate.
• So salt accumulates in the sea until the salt is about 3.5% (~ 35 grams of salt per liter of water).
Brief summary: The sea is salty because "the water evaporates, but the salt does not leave." 🧂
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