OK, the last answer may have been tough so we’ll try this from a little different angle.
We know what the meaning of the word ’energy’ is. We have a quantity called ’energy’ in the equations describing how things move around and take on new forms. ’Energy’ comes in various forms, including motion, electromagnetic fields, and the existence of particles with mass.
I don’t really know what the word ’matter’ means. I guess it means particles with mass like those that make up the familiar stuff around us. Most of the time, those particles are a part of the things that have energy, but you can also have energy without any massive particles.
Mike W.
(published on 10/22/2007)