A student measured the mass of ice in a glass container with a tight lid. He allowed the ice to melt, and then found the mass of the container, its lid, and its contents again. What conclusion could he draw based on the masses he measured?
No matter how tight the lid is, some mass is lost when a solid melts.
The liquid formed from a melted solid has less mass than the solid has.
The liquid formed from a melted solid has the same mass as the solid has.
The liquid formed from a melted solid has a greater mass than the solid has.
