eli5 If matter cannot be destroyed or created, how does space constantly expand?

Question

Maybe I’m misinformed about this. But I was always told matter cannot be destroyed or created. But I have been told space is constantly expanding. Is this expansion of space not made up of “matter”? Where does it come from?

In: 282

Answer 1

You have cake. You cut the cake in half. You take both halves apart.

You have the same matter, but now it occupies more space.

Space is expanding, as in spreading apart. Not adding more mas