Hey kiddo! Have you ever seen a pot of water boiling on the stove? Remember the bubbles that come up to the top? That's called evaporation. It happens because the water is being turned into a gas called water vapor.
Well, vaporization is basically the same thing as evaporation, but it can happen at any temperature – not just when water boils. For example, you know how sometimes your mom puts a pot of soup on the stove and it slowly starts to disappear into thin air? That's because the liquid is turning into a gas too.
The process of vaporization can happen in a few different ways. One way is called boiling, like what happens with water on the stove. Another way is called evaporation, like when puddles on the ground disappear after a rainy day. And yet another way is called sublimation, which is when a solid (like ice) turns directly into a gas (like steam) without ever becoming a liquid in between.
So, in short, vaporization is when a liquid turns into a gas, and it can happen by boiling, evaporation, or sublimation. Pretty cool, right?