What is the best description of a closed system?
a system in which matter and energy are not exchanged with the surroundings
a system in which both matter and energy are exchanged freely between the system and the surroundings
a system in which energy can enter or leave the system but matter cannot
a system in which matter can enter or leave the system but energy cannot
a system in which matter and energy are not exchanged with the surroundings
a system in which both matter and energy are exchanged freely between the system and the surroundings
a system in which energy can enter or leave the system but matter cannot
a system in which matter can enter or leave the system but energy cannot