Final answer:
An open system exchanges both matter and energy with the environment, while a closed system only exchanges energy. The mass of soda in an open system can change due to evaporation, whereas in a closed system it remains constant if it's properly sealed.
Step-by-step explanation:
An open system is different from a closed system in that an open system can exchange both matter and energy with its surroundings, while a closed system can only exchange energy, not matter. When a soda is poured into a glass in an open system, the mass of the soda can change if some of the soda evaporates. When pouring a soda into a glass, the mass of the soda will be the same in both an open system and a closed system, as the amount of matter in the soda does not change. In a closed system, like soda in a sealed container, the mass remains constant despite transferring heat with the surroundings, as long as the container is leak-proof and no matter escapes.