Can Matter Disappear?

The question is : Can Matter Disappear?
I think the answer is the matter can't disappear.
Because air is kind of matter, But you can't see it or touch it
So you can't make sure if it's there or not.
And another one is solid, because solid is kind of matter, too.
Example: Like paper, If you cut a paper in an half, it still a paper.
So you can't disappear them.
And the liquid, You can see the liquid anywhere, so you can't disapper them.
I think thatz the answer.