Comment by indigochill

But even if we're arguing physics, that's debatable. The shape and toughness of the rock are actually an effect of forces between the atoms composing the rock, and the weight of the rock is actually the interaction between the mass of the rock and the earth. The color of the rock is the effect of the interaction between the molecules in the rock and photons (which are themselves wave-like) and then the interaction between that light and the cells in your eyes.

Objects are a convenient day-to-day model in real life and software, but there are more "functional" models that comprise the object model.