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The materials required for this science fair project:

-    A soccer ball
-    A measuring tape
-    A field of Kentucky bluegrass
-    A field of Bermuda grass
-    A field of artificial turf
-    An assistant


1.    For this science fair project, the independent variable is the type of turf i.e. Kentucky bluegrass, Bermuda grass and artificial turf. The dependent variable is the bounciness of the soccer ball. This is determined by observing and counting the number of times the ball bounces off the turf.  The constants (control variables) are the height from which the ball is dropped, the type of ball and the moisture of the grass on the field.

2.    3 locations of fields of Kentucky bluegrass, Bermuda grass and artificial turf are selected. If necessary, other types of turf can be used. A trip to the 3 fields is made with the assistant (don't forget the soccer ball!).

3.    With the help of the assistant and a measuring tape, hold the soccer ball at a height of 2 meters. The ball is dropped from that height. The number of times the ball bounces off the ground is counted. The test is repeated 10 times and the average number of bounces is calculated. Record the results in the table given below.

4.    Procedure 3 is repeated for all 3 types of turf and the results recorded in the table below.

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Complexity level:
Project cost ($):
Time required:
1 hour to prepare, 1 day for science project experiment
Material availability:
Easily found. You can borrow a soccer ball from a friend, or purchase one at a sports store
Safety concerns: