Spaghetti Graphing/Dancing Spaghetti Group Lab

Spaghetti Graphing/Dancing Spaghetti Group Lab

Quiz grade

Objectives:

·  To determine the relationship between mass and length

·  Practice Significant figures and Scientific notation

·  Understanding the steps of Scientific Method

·  Introduction to Chemical Reactions

Materials: spaghetti (different lengths), balance beam, metric ruler, graph paper, colored pencils/markers, 100 mL Beaker, 100 mL graduated cylinder, vinegar, baking soda, stirring rod, paper towels and water

Part I. Spaghetti Measuring and Graphing

Procedures:

·  Get in 6 groups: Each group obtain 5 pieces of spaghetti of widely varying lengths

·  Predict the trend of mass vs. length of spaghetti (Hypothesis) and then measure each piece of spaghetti and write down these measurements in the Raw Data section

o  Measure the length of each piece of spaghetti with a metric ruler in cm and mass with balance beam in grams

·  Make a data table: include title, each mass and length measurement and write down the number of significant digits/figures and then scientific notation for mass and length-put in result section

·  Use your data table to make a line graph of mass and length (label the x and y axis, indicate independent vs. dependent variable, and include a title)

Part II. Dancing Spaghetti

Procedures:

·  Stay in your same groups and predict what you think will take place in this part of the experiment.-Need to read procedure to determine Hypothesis

·  Using the 250 mL beaker measure out 75 mL of water.

·  Using the 50 mL beaker measure out 10 mL of Baking Soda.

o  You will need a spatula to obtain Baking Soda-Do not put excess Baking soda back into the original box

·  Place Baking soda in 250 mL beaker with the water. Stir the mixture thoroughly with stirring rod.

·  Put the 5 small pieces of spaghetti into the same beaker and wait (about a minute) for them to settle to the bottom.

·  Next, put some paper towels under the 250 mL beaker.

·  Measure 20 mL of vinegar in a graduated cylinder.

·  Next, pour vinegar into the same beaker as mixture and spaghetti and watch what happens. Will need to watch for at least 5 minutes. Record what happens under the Observation section.

Write up: Must me handwritten as neatly as possible and must be in the following order

1.  Title part: Center the title on the top line of paper and Partners Names should be centered right under the title 6 pts

2.  Purpose (in your own words) 8 pts

3.  Hypothesis (Part I and II) 10pts

4.  Summarize Procedures for Part I and II and include materials 10 pts

5.  Raw Data –original paper work in this section 10 pts

6.  Observations-What you notice during Part I and Part II 10 pts

7.  Results: Worth a Total of 36 points

a.  Part I-Chart to include: Title, Length and Mass measurements, and Significant Figures and Scientific Notation for length and mass (15 pts)

b.  Part I-Graph to include: Title, Line graph with all parts properly labeled (15 pts)

c.  Analyze Questions:

Part I (2 pts)

Ø  What was the Independent Variable and Dependent Variable?

Part II (4 pts)

Ø  What caused the spaghetti to float?

Ø  What caused the spaghetti to sink?

8.  Conclusion: 10 pts

Part I

Ø  What is the SI unit for length and mass?

Ø  What can you infer about the length of the spaghetti to its mass?

Ø  Was your hypothesis right or wrong? Explain.

Part II

Ø  Was your prediction right or wrong? Explain.

Ø  Summarized what took place in Part II.

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