Tootsie Roll Debate Name___________________________
Name___________________________
Name___________________________
Dot and Junior are arguing about which is chewier: regular tootsie rolls or flavored tootsie
rolls. Dot insists the flavored tootsie
rolls are not as chewy. Junior does not
agree. He insists both have the same
consistency. In order to decide who is
right (and they needed to do a project for math class), they decide that
finding the density of a tootsie roll will determine the “chewiness” for the
candy (at least they agree on something).
If the flavored tootsie roll has the same density as the regular tootsie
roll, Junior wins. If the flavored tootsie
roll is less dense, Dot wins.
For this experiment you will need:
You will need 2 pieces of 3 sizes of Regular
Tootsie Rolls.
1 flavored tootsie roll
100 ml Graduated cylinders and water
2 or more electronic or triple beam balances
Data collection:
Unwrap and weight each tootsie roll. Record the data in the table below.
Partially fill a graduated cylinder with
water. Measure how much water before and
after dropping a tootsie roll in.
Subtract the two numbers to find the volume of each tootsie roll. Record its volume in the chart.
|
|
Mass (Weight) in grams |
Volume in ml (= cm3) |
|
Tootsie roll #1 (large size) |
|
|
|
Tootsie roll #2 (large size) |
|
|
|
Tootsie roll #3 (medium) |
|
|
|
Tootsie roll #4 (medium size) |
|
|
|
Tootsie roll #5 (small size) |
|
|
|
Tootsie roll #6 (small size) |
|
|
|
Flavored Tootsie roll |
|
|
Analyze of data:
Make a graph of the data from the regular tootsie
rolls (not including the flavored tootsie roll), mass (weight) vs. volume. Compute a line of best fit. Label the axis and the scale marks.
Write the equation of the line:
______________________________
What are the units of slope? ________________________________
What does the numerical value of slope mean in
this problem? Is this what Dot and Junior are looking for?