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

I don’t have the answer but I feel like fire should be considered a form of energy and that can certainly be created. And it can grow thus becoming bigger and bigger energy. So I don’t understand that.