I mostly agree with you, but I would add that systems fit different models (aka abstractions) as they scale and that as we add water molecules to a system we'll start to see microfluidic, then fluid, then oceanographic,.. cosmological properties emerge. The molecules are the same and always behaved with all of those properties, but whether or not we can see them easily, or can use them as a modelling tool depends on the scale.
I mostly agree with you, but I would add that systems fit different models (aka abstractions) as they scale and that as we add water molecules to a system we'll start to see microfluidic, then fluid, then oceanographic,.. cosmological properties emerge. The molecules are the same and always behaved with all of those properties, but whether or not we can see them easily, or can use them as a modelling tool depends on the scale.