the amount of matter in something is its mass. the mass is constant everywhere in the universe. Not true: The mass increases when you speed up particles to very high speed. This is relevant for our...
Well, in one instance matter is the atoms making up every object on Earth and beyond it, measured by mass, volume, and density. In another instance, things that matter are things that are important....
So we can have gravity.For example:If you go to sit in a chair there wouldn't be chairs! Because that is matter.So now you understand why matter matters.it doesnt