Explain to the children that just as an inch is used as a standard unit of measurement for length, a quart is used to measure the volume of something.
(the children; just is used; as a standard unit of measurement for length) (a quart; is used; to measure the volume of something) (a quart; to measure; the volume of something)
the children a quart a quart
just is used is used to measure
as a standard unit of measurement for length
to measure the volume of something
the volume of something