A balance is different from a scale because it uses a known mass to measure the unknown mass whereas a scale actually measures weight.
(A balance; is; different from a scale; because it uses a known mass to measure the unknown mass) (it; uses; a known mass; to measure the unknown mass whereas a scale actually measures weight) (a scale; actually measures; weight)
A balance it a scale
is uses actually measures
different from a scale because it uses a known mass to measure the unknown mass
a known mass to measure the unknown mass whereas a scale actually measures weight
weight