This standard's based assessment is on the Distillation method of mixture separations. It is leveled and evaluated the physical properties needed to make this "beach" separation.
I use this assessment along with a hands-on lesson in which students learn what evaporation/distillation is and use the method to separate salt from water. (They are given a beakers with sand, seashells, and salt-water in it and use other methods to separate the the sand and seashells first).
Answering the first 4 questions correct=2
Fewer than the 4=1
Answering the open-ended correctly=3
Unfortunately I did not have space for a rubric (something even my students pointed out!) But I did provide a COMPLETE answer key with an open-ended response example.
ANSWER KEY INCLUDED