Name: ______Period: ______Date: ______

Problem/Question: Does the density of an object change with the size of the sample?

CandyBar Density Lab, Part 1

Materials

  1. One (1) “fun size” candy bar per person, plus one more 
  2. Triple Beam Balance or Electronic Balance
  3. Metric Ruler
  4. Paper Plate
  5. Scissors

Procedure

1. Measure the mass of the candy bar (do not unwrap the candy bar). Record the data in the data table.

2. Measure the length, width and height of the candy bar in centimeters. Record the data in the data table.

It doesn’t really matter which way the candy bar is measured as long as you measure all 3 dimensions.

3. Calculate the volume of the candy bar. Use the formula L x W x H. Record the data in the data table

***The candy bar is really an irregular solid. To be more accurate, what method should we use to get the volume of the candy bar? Record your answer on the line below.***

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4. Calculate the density of the candy bar. Use the formula D=M/V. Record the data in the data table.

D= density M= mass V= volume

5. Create a bar graph comparing the density of the four (whole) candy bars.

Candy Bar Density Lab – Part 2

Investigative Question: Does the density of a candy bar change if we cut it in half?

Prediction/Hypothesis: In the space below, make a prediction about the density of half of a candy bar. Use an “If-Then” Statement.

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Procedure

1. Using only one of the candy bars you used in Part 1 of the lab, cut the candy bar in half (do not unwrap the candy bar)and measure the mass of half the candy bar. Record the data in the data table. Don’t worry, you will be given a replacement to eat.

2. Measure the length, width and height of half of the candy bar in centimeters. Record the data in the data table.

3. Calculate the volume of half the candy bar. Use the formula Volume= L x W x H. Record the data in the data table.

4. Calculate the density of half the candy bar. Use the formula D = M/V. Record the data in the data table.

Name: ______Period: ______Date: ______

Data Table

Whole Candy Bar / Half Candy Bar
Candy Bar Name
Mass
Length, Width, Height (in centimeters)
Volume L x W x H
Density D = M/V

Bar Graph– Density of Candy Bars (Be sure to label the X-axis and Y-axis and provide a title)

Conclusion

Is density dependent on the size of the sample? Why or why not? (Answer below)

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