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Bell Ringer Place Lab Rat on your desk!

Explore how many marbles different numbers of spaghetti strands can hold. Modify the experiment and analyze the data to find patterns and make predictions. Identify potential sources of error and improve the procedure.

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Bell Ringer Place Lab Rat on your desk!

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  1. Bell Ringer Place Lab Rat on your desk! • Describe what is the independent variable. • Which axis is the independent variable? • Describe what is the dependent variable. • Describe how you find the slope of a line on a graph.

  2. Spaghetti Lab! How many marbles can various numbers of spaghetti strands support? What modifications can you make??

  3. Materials • 40 spaghetti pcs. • 40 marbles • 1 cup • 1 bucket -string • Spaghetti Lab • Purpose: Graphically represent the minimum # of marbles it takes to break specific # of spaghetti strands. • Procedure: Describe your procedure. • Data Table: with headings, units • Graph Must Include… • Title, Scale, Data, best-fit line • Calculations for slope • Label Independent and Dependent variables

  4. Procedure: • Begin with 1 spaghetti piece and the empty ‘bucket’ (cup/string). • Add marbles one at a time until the spaghetti breaks. • Record the data: • Empty the ‘bucket’ and repeat with TWO spaghetti pieces. • Continue until time or 8 spaghetti pieces.

  5. Describe the relationship between marbles and spaghetti strands. • Looking at your graph, do you seen any patterns? • If so, what patterns do you see? Write an IF/THEN statement • Ex: IF the number of spaghetti strands increases…..THEN the number of marbles…. • Predict approximately how many marbles can 10 strands of spaghetti support? Describe how you came up with this value. • What modifications did you make to improve the procedure of this lab?? • Describe some difficulties that you had when collecting data and what you did to fix them. • Sources of Error: • Describe possible sources of error that would explain why your prediction was “off.” Conclusion (separate sheet)

  6. Lab Report Format • Purpose • Procedure • You’ve numbered and describe the steps • Data Table : headings, units! • Calculations of slope including the formula • Graph Includes… • Title, Axis labels, Scale, Data, best-fit line • Label Independent and Dependent variables • Conclusion includes: IF/THEN relationships, prediction, improvement, error

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