What is porosity?

Porosity is how much space there is inside something, like how many pockets or holes it has.

Imagine you have a sponge and a brick. The sponge feels soft because it’s full of little pockets that can hold water, while the brick feels solid because it doesn’t have those pockets. That’s what porosity means, how much empty space is inside something.

When you put the sponge under the tap, it soaks up lots of water. That’s because it has high porosity, lots of little spaces to hold that water. But when you squeeze out all the water, those pockets are still there, they just look empty.

Now imagine a brick. It doesn’t soak up much water, even if you put it in the bath. That means it has low porosity, not many spaces inside for water to go into.

So, porosity is like the number of pockets inside something, the more pockets, the more space there is for things like water or air to move through! Porosity is how much space there is inside something, like how many pockets or holes it has.

Imagine you have a sponge and a brick. The sponge feels soft because it’s full of little pockets that can hold water, while the brick feels solid because it doesn’t have those pockets. That’s what porosity means, how much empty space is inside something.