```Lyvonia Hearns - Asa Philip Randolph

Pick one weak spot on your Tower.  What change could make the weak spot
sturdier?  Anything you could change on your Tower is a variable.  Now with your
team make a list of changes that might improve your Tower in general.  Some

Shape- Could you make a square or polygon (many sided shape) into triangles to make it stronger?Strength- of beams- Could you combine 2 or more straws to make a beamstronger?Length of straws- Could some beams be longer?  Should some be shorter (cut straws) Joints- Are there other ways to connect the straws?Locations of strong beams- Should the strongest beams be near the top of the tower or the bottom?Size of foundation (base)- What effect does changing the size of the foundation  have on your Tower?Location of Weight Basket- Does it matter where you attach the Weight Basket? (The bottom must be at least 20cm (8in) off the ground.) MAKE A CHANGE

Choose one variable from your list.  Make the change to a weak spot on your
Tower.  Make one change at a time.  (For ex., if you change to longer beams,
don't also change the size of the foundation.)  Why is it important to change
only one variable at a time?  Record the variable you changed on your lab report
next to "15-Straw Tower" Now test your change.  Attach the Weight Basket to the
exact same spot as before.  Add 20 pennies and observe your Tower.  Did the
change make the weak spot sturdier?  Record the results.

Keep Building

Set aside 15 more straws from your 50.  Continue to build and strengthen your
Tower.  After these 15 straws have been added, test your Tower with a Strength
Test as before.  Then change one variable that could make the weak spot
stronger.  Add the last 20 straws to your Tower.  Repeat the Strength Test.
Make the final changes until your team is satisfied with your Tower's strength,
shape, weight Basket attachment, and height.