What causes salinity changes?

Saltwater is like a juice box, when you pour more liquid in or let some out, it changes how strong the flavor (or salinity) is.

Imagine your favorite juice box, if you add more water, the juice becomes weaker. If you drink most of it and leave only a little behind, that leftover juice gets stronger. The same thing happens with oceans!

When rivers flow into the ocean, they bring along dirt and minerals, including salt! It's like adding extra sugar to your juice box.

Sometimes, the ocean loses water through evaporation (like when you leave a glass of water out on a hot day, and it gets smaller). The salt stays behind, making the remaining water even saltier. But if fresh water comes in again, like rain or melting ice, it weakens the saltiness again.

So, salinity changes happen because the ocean is always getting new stuff added or losing some of its liquid, just like your juice box! Saltwater is like a juice box, when you pour more liquid in or let some out, it changes how strong the flavor (or salinity) is.

Imagine your favorite juice box, if you add more water, the juice becomes weaker. If you drink most of it and leave only a little behind, that leftover juice gets stronger. The same thing happens with oceans!

When rivers flow into the ocean, they bring along dirt and minerals, including salt! It's like adding extra sugar to your juice box.