8th Grade Performance Task

Contributed by: New York State Education Department (NYSED)

NYS Alternative Assessment in Science Project (1996)

### Student #1

### Task:

At this station, you will be measuring the effect
of height on the bounce of a ping-pong ball.

### Materials:

### 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)**

7. Based on your observations, write a generalized
statement describing the relationship between the height of release
and the height of bounce of a ping-pong 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.