Title: By:

Experimental Design Problem- What is the effect of ___________ on the ____________________________? IV: Levels of the IV [Put your Control in ( ) ]: Reason control was selected: DV:

Experimental Design Constants (3) : same ______, _________, and ______ Hypothesis: If ___________is ___________, then ____________ will _______________.

Material List: Tennis Ball, Ping Pong Ball, Golf Ball, Racquet Ball, masking tape, meter stick Materials

Procedures 1. Gather materials 2. Tape a meter stick up against the wall 3. Hold the ball at 100 cm, then drop it. 4.Record height of the bounce for 5 drops 5.Repeat steps 3-4, for each type of ball for 3 trials 6.Calculate the averages. 7. Analyze the data

Trial 1 Type of Ball Drop 1Drop 2Drop 3Drop 4Drop 5Averages Tennis Ping- Pong Golf ball Racquet Height of Bounce (cm)

Trial 2 Type of Ball Drop 1Drop 2Drop 3Drop 4Drop 5Averages Tennis Ping- Pong Golf ball Racquet Height of Bounce (cm)

Trial 3 Type of Ball Drop 1Drop 2Drop 3Drop 4Drop 5Averages Tennis Ping- Pong Golf ball Racquet Height of Bounce (cm)

Averages of 3 Trials Type of Ball Trial 1Trial 2Trial 3Final Averages Tennis Ping-Pong Golf ball Racquet Height of Bounce (cm)

Averages of Trials Height of Bounce (cm) Type of Ball

Final Averages Height of Bounce (cm) Type of Ball

Discussion – Averages of each ball bouncing : Racquetball (79 cm), Golf Ball (63 cm), Ping-Pong ball (46 cm), and the Ping-Pong Ball (34 cm). Research stated rubber ball compresses air inside it as it hits the floor (air is stored as Potential Energy) Racquetball bounced highest because it was able to compress the most Tennis Ball bounced lowest because it had most drag caused by fuzz More ball could compress, higher the ball bounced (Directly Proportional).

Summary of Findings/Conclusion Hypothesis: If ___________is ___________, then ____________ will be _______________. Hypothesis was accepted/rejected, because the _______________ bounced _______________ than the __________________