what is an obvious physical difference between saturated and unsaturated fats? what is an obvious physical difference between saturated and unsaturated fats? unsaturated fats are soluble in water while saturated fats are not. saturated fats are soluble in water while unsaturated are not. saturated fats are usually solids while unsaturated fats are usually liquids. saturated fats burn cleaner than unsaturated fats. none of the above