Title: Step 3: Test, evaluate, and redesign
Course: To Infinity and Beyond! (5th grade)

Set up a target the size of a dart board (about 2 feet in diameter.) Stand 5 feet away and try to hit it with your rocket. Can you make your rocket hit the target every time?

Once you've hit the target 5-10 consecutive times try one of the following Challenges:

# of Breaths Challenge - It's very important that launch angle is the same for each launch.

1. Fill the balloon with three breaths of air, launch the rocket, and measure how far it travels.
Repeat 3 times.
Find the MEAN average.
2. Now fill the balloon with four breaths of air, launch the rocket and measure how far it travels.
Repeat 3 times.
Find the MEAN average.
3. Continue with 5, 6, and 7 breaths.
4. Plot the distance traveled against number of breaths. X axis is number of breaths and Y axis is distance traveled.

Launch Angle Challenge It's very important that you always use the same number of breaths for each launch.

Use a book to prop rocket and a protractor to measure and position launch angle.

1. Launch rocket at a 30 degrees and measure how far it travels.
Repeat 3 times.
Find the MEAN average.
2. Launch rocket at a 45 degrees and measure how far it travels.
Repeat 3 times.
Find the MEAN average.
3. Launch rocket at a 60 degrees and measure how far it travels.
Repeat 3 times.
Find the MEAN average.
4. Launch rocket at a 90 degrees and measure how far it travels.
Repeat 3 times.
Find the MEAN average.
5. Plot the distance traveled against launch angle. X axis is launch angle and Y axis is distance traveled.