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Height of Bounce
Rubric

8th Grade Performance Task
Contributed by: New York State Education Department (NYSED)
NYS Alternative Assessment in Science Project (1996)

Height of Bounce - Scoring Rubric

 
Maximum score - 13 points

 


Questions 4. and 5. Height of bounce data table
3 points total

 

Height of Release
Height of Bounce (in centimeters)
10 cm
3 - 6 cm
20 cm
10 - 18 cm
30 cm
15 - 25 cm
40 cm
20 - 30 cm

*** The ranges for height of bounce in the table are examples only.

 

 

Point Criteria:

  • Allow 1 point for correctly averaging and rounding at least 3 of the 4 distances.
  • Allow 1 point for data collection taken three times (3 trials).
  • Allow 1 point for data showing height of bounce within the acceptable range in at least 3 of 4 releases.

*** The ranges in the table above are examples. Teachers should determine their own acceptable range for height of bounce before students do their testing.
To establish ranges, testing should be done on the same surface and with the same equipment that the students will be using.


Question 6. Graph of data
5 points total

Point Criteria:

  • Allow 1 point for each data point plotted to an accuracy of +/- cm "height of release," and +/- 2cm "height of bounce" based on student's data.
  • Allow 1 point for plotted points connected properly.

Question 7. Relationship between bounce and release heights
2 points total

Point criteria:

  • Allow two points if the student states a directly proportional relationship between the height of bounce and the height of release.
    Possible answers:
    • As the height of release increases, the height of bounce increases.
    • The higher I release the ball, the higher the height of bounce.
    • The lower the height of release, the lower the height of bounce.
    • The height of bounce is approximately 1/2 to 3/4 that of the height of release.
    • The height of the release was higher than the height of bounce.
    • The height of the release is larger than the bounce.
    • The higher you drop the ball the further away the bounce was from the height you dropped it from.
  • Allow one point (partial credit) if the student states the relationship only in terms of his/her own data.
    Possible answers:
    • A ball dropped from 40 cm bounces higher than a ball dropped from 10 cm.
    • A ball dropped from 40 cm bounces up to 30 cm high (or student's own data).

Question 8. Predict the bounce height for release of 60 cm
3 points total

Point Criteria:

  • Allow 1 point if the student successfully predicts a bounce height between 30-45 cm**
    ** This range is an example. The teacher should establish an acceptable range for this height of bounce also.
    • Accept a student's prediction if supported by his/her graph.
  • Allow 2 points if the student explains his/her prediction using the data collected.
    • I extended the line on my graph and observed where it crossed over the 60 cm release point.
    • Since the heights of bounce were approximately 1/2 to 3/4 the height of release, a ball dropped from 60 cm would bounce 30-40 cm.
  • Allow 1 point if the student implies or states that he/she tested a ball drop from 60 cm.

 
Highest possible score - 13 points

Scoring Form - Height of Bounce

Student ID _______________

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.

Question
Circle
Point
Breakdown
Points Earned
4. & 5. Bounce Data Table        
3 trials completed
0
1
   
Average
0
1
   
Data within range
0
1
 
___________
6. Graph        
10 cm plot
0
1
   
20 cm plot
0
1
   
30 cm plot
0
1
   
40 cm plot
0
1
   
overall (connected) plot
0
1
 
___________
7. Stated Relationship
0
1
2
___________
8. Extrapolation to 60 cm        
Predicted height
0
1
   
Explanation
0
1
2
___________

Total Score _______________
Total possible score - 13 points

 


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