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
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