Q. What is the difference between baking and roasting in an oven?
There is no difference. If you want to be finicky or traditional, you can't actually roast food in an oven to roast traditionally meant to cook food (meat) with an open flame, as on a spit in front of a
fire (as opposed to grilling on a grate over a fire). But the fire and its radiant heat were the essential components of roasting. Nowadays, roast is bake and bake is roast.