Aspire Expo Brought to you by Research Organization Texas Academy of Math and Science University of North Texas
Why? • We use it everyday! • Help us organize our thinking • Solve problems!
The Steps Problem/Purpose Hypothesis Materials Conclusion Results Procedure Future Works
Step 1: Problem/Purpose • What are we trying to figure out? • Why do we need this information? • Demo: How does weight on the outside affect how fast someone can spin? • Many sports such as gymnastics and diving require athletes to contort their bodies into spinning shapes. How can they spin faster to perform the tricks they need to do?
Step 2: Hypothesis • What do you think will happen? • Why do you think that? • Demo: If the spinning person is holding weights, he can spin _______ after retracting his arms. • Why do you think so? • Momentum?
Step 3: Materials • What items and materials do you need? • How much of each material? • Demo: 1 spinning disk, 2 volunteers, 2 weights
Step 4: Procedure • How are we going to test our problem? • Step by step, detailed, clear • Demo • Select two student volunteers • Have one student spin on the disk with his arms out. • After a few rotations, have student withdraw his arms • Observe change in speed • Have same student spin on the disk with his arms out while holding weights in each hand. • Repeat steps 3 and 4. • Repeat steps 2 through 6 with second student.
Step 5: Results • What did your experiment show? • Demo: • After retracting arms, the spinning person spins faster. • With weights, the increase in speed is greater.
Step 6: Conclusion • What have we determined from this data? • How does it compare to our hypothesis? • Demo: Angular momentum is the reason for these results! • What’s that? We’ll explain! • Did our results match our hypothesis?
Step 7: Future Works • What new questions and problems does your experiment bring-up? • Demo: • How does the size or weight of the spinning person affect the speed? • Would more weight further increase the change in speed? • How do different body positions affect the spinning speed?