Contributed by: New York State Alternative Assessment in Science
Project (NYSED)
Scoring Rubric 
Maximum Score  10 Points 
Question 1. Mass of the Sinker 
2 points total 

Point Criteria:
 Teacher determined mass: "n" grams
 Allow 1 point for mass within the acceptable ranges.
 triple beam or double pan balance; accuracy of +/ 1.0
grams.
 spring scale; accuracy of +/ 2.0 grams.
 Allow 1 point for labeling units as grams.
Question 2. Procedure for Volume 
2 points total 

Point Criteria:
 Response should include:
 Put sinker into graduated cylinder.
 Measure initial and final volumes.
 Difference is the volume of the sinker.
 Allow 2 points if all three elements are included.
 Allow 1 point if two elements are included OR if student writes
"water displacement method."
 *** Points should be based on the procedure not the actual value
for the volume of the sinker.
Question 3. Volume of the Sinker 
2 points total 

Point Criteria:
 Teacher determined volume: "n"milliliters
 Allow 1 point for volume within the acceptable range (+/ 1.0
milliliters).
 Allow 1 point for labeling the units as milliliters.
Question 4. Density of the Sinker 
3 points total 

Point Criteria:
 Density calculation should be based upon the student's
values of mass and volume.
 Allow 1 point for density within the acceptable range (+/ 0.5
g/ml).
 Allow 1 point for labeling units as g/ml
 Allow 1 point for correct substitution of the student's values
into the density formula.
Question 5. Density of 1/2 the sinker 
1 point total 

Point Criteria:
 Allow 1 point for a statement indicating that the density of
1/2 the sinker will be the same as the whole sinker because density
is not directly related to volume.

Highest possible score  10 points 

Scoring Form

