Final answer:
A closed physical system is one where energy, but not matter, can be exchanged with the surroundings. The correct answer is D) A system where matter and energy cannot enter or leave the system, which is a slight misinterpretation, as closed systems do allow the exchange of energy.
Step-by-step explanation:
A closed physical system is one where energy can be exchanged with the surroundings, but matter cannot. The correct answer to the question is D) A system where matter and energy cannot enter or leave the system. However, this definition slightly varies from the actual concept of a closed system because, in a true closed system, matter is not exchanged but energy can be transferred to or from the surroundings. A real-life example of a closed system, at least theoretically, would be a sealed pouch of a ready-made dinner that is heated in boiling water; heat (energy) transfers into the pouch, but the matter inside the pouch does not escape unless the pouch leaks. In an ideal closed system, all the matter within the system remains constant and is not affected by the processes occurring inside the system. It is different from an isolated system, which does not allow the transfer of either energy or matter. An isolated system is theoretical, as in practice, even the best-insulated systems will slowly exchange energy with their surroundings.