Using the salt to lower the freezing point of the ice is a physical change because the salt and water could be separated.
(Using the salt to lower the freezing point of the ice; is; a physical change; because the salt and water could be separated) (the salt and water; could be separated; )
Using the salt to lower the freezing point of the ice the salt and water
is could be separated
a physical change because the salt and water could be separated