Contributed by: New York State Alternative Assessment in Science
Project (NYSED)
1996 Administration
Maximum Score: 8 Points
Question 1 Procedure for Identifying Liquids 
3 points total 
Point Criteria: 
 Allow 3 points for a valid, logical procedure that includes
the finding and comparing the masses of the two
liquids. (The mass, volume, and density of the bottle is irrelevant
to the student's responses for this activity.)
 Acceptable responses include:
 Mass Method
 Find the mass of the yellow liquid (1 point)
 Find the mass of the blue liquid (1 point)
 Compare to find which would have the greater density
(1 point)
or
 Mass the yellow and the blue (2 points)
 The heavier will be more dense (1 point)
 Density Method
 Find the mass of both liquids (1 point)
 Assign a volume to both liquids (1 point)
 Compare densities (1 point)
Question 2 Results of Experiment 
2 points total 
Point Criteria: 
 Allow 1 point for correct blue liquid data based upon the student's
plan.
 Allow 1 point for correct yellow liquid data based upon the
student's plan.
 Mass Method
 Qualitative mass comparison using a double pan balance
is acceptable.
 Quantitative mass must be within +/ 1.0 grams
 Density Method
 Density must be within +/0.5 g/ml
Question 3 Identification of Liquids 
1 points total 
Point Criteria: 
 Allow 1 point for correctly identifying both liquids
 Blue liquid = X
 Yellow liquid = Z
(Accept any student response based on his/her data)
Question 5 Density/Mass Relationship 
2 points total 
Point Criteria: 
 Allow 2 points for a generalized statement abut the density/mass
relationship.
 If two substances (solutions) have equal volumes, the one
with the greater mass will have the greater density.
 The mass of the yellow was greater than the blue. Since
the volumes were the same, the yellow is more dense.
 Allow 1 point if the student does not address a constant
volume.
 The liquid with the greater mass has a greater density.
Highest possible score  8 point

NYS Alternative Assessment in Science Project
Copyright, April 1996
The State University of New York
The State Education Department
Albany, New York 12234
Student ID ________________ 
Scoring Form  Unknown Liquids 
Male or Female (circle one) 
Circle the student's score for each question. Add the points for
each question and write the total score at the bottom of the scoring
form.

Total Score ____________________ 

Total possible score  8 points 
Student ID ________________ 
Scoring Form  Unknown Liquids 
Male or Female (circle one) 
Circle the student's score for each question. Add the points for
each question and write the total score at the bottom of the scoring
form.

Total Score ____________________ 

Total possible score  8 points 
