8th Grade Performance Task
Contributed by: New York State Education Department (NYSED)
NYS Alternative Assessment in Science Project (1996)
Task:
At this station, you will be measuring the effect
of height on the bounce of a pingpong ball.
Materials:

PingPong ball
 1 box fitted with a metric scale (taped down or balanced with
books)
 calculator
Directions:
1. Check to see that your materials are set up as shown in the
diagram above.
2. Before you begin your task, follow the directions inside the
box:
For practice, release the ball from any point on the
scale and determine the height to which it bounces. The "height
of bounce" is the distance from the table top to the bottom
of the ball on the first bounce. (Practice a few times to
make an accurate observation. 
3. Your task: Hold the ball near the scale on the box so
that the bottom of the ball is level with the 10 centimeter
mark. Release the ball and observe how high it bounces.
4. Record the height that the ball bounced in trial 1 on the data
table. Round your answer to the nearest whole number of centimeters.
5. Repeat steps 3 and 4 for release heights of 20 cm, 30 cm, and
40 cm.
Data Table: Height of Bounce (in cm)
Height of Release

Trial 1

Trial 2

Trial 3

Average

10 cm





20 cm





30 cm





40 cm





6. Use the average data from your data table to construct
a graph on the grid below. Connect the points to make a line graph.
7. Based on your observations, write a generalized statement describing
the relationship between the height of release and the height of
bounce of a PingPong ball.
8. If you were able to bounce this ball from a height of 60 cm,
how high (in centimeters) would you predict that the ball would
bounce?
In the space below, explain how you used your data to make this
prediction.
