When you add salt to the ice water, you lower the melting temperature of the ice down to 0 F or so.
(you; add; salt; to the ice water) (you; lower; the melting temperature of the ice down to 0 F or so; T:When you add salt to the ice water)
you you
add lower
salt to the ice water
the melting temperature of the ice down to 0 F or so T:When you add salt to the ice water