My understanding is that all matter is made up of quantum bits / atoms / molecules which are always in motion either bumping or vibrating.

The motion from this bumping and vibrating ‘creates’ a form of energy called heat.

This seems to be an emergent quality of ‘motion’, but I don’t get what ‘heat’ is…

1. ‘Created’ seems like an odd way to describe how heat is formed, since energy can neither be created nor destroyed? Imagine you have an isolated system with 2 non-touching atoms. In this state there is no heat. Now we take the same system, and make the 2 atoms touch / vibrate. Now there's heat. But from where?

2. If atoms, or quantum bits are generating ‘heat’ from their movement - what is ‘heat’ made of?

3. Is heat made of matter (bits, atoms) as well? or is heat just the word used to describe the act of motion? Light = photons. Electricity = electrons. Heat = ???

I’m not sure if this is a linguistic problem with the word heat, or if I’m missing something.