Unit #1 - Lab #1 - Circle Lab
Procedure
Find 6 (or more) circular objects of varying sizes.
Make a data table with object name, diameter, circumference and area as headings.
Measure the diameter of each object using a ruler. Record in the data table.
Measure the circumference of each object (string is available). Record in the data table.
Measure (do not calculate) the area of each object using graph paper (the unit of area will be “squares”). You find the area by counting the number of squares covered by the object on a piece of graph paper. Record the area in the data table.
Data Analysis
Log-in on computer.
Make sure US_dan4_hp2300 is your default printer.
DIAMETER VS CIRCUMFERENCE
1. Click on Graphical Analysis icon on the desktop.
2. Click “Close” once you are in Graphical Analysis.
3. Double click on “X” on data set 1
4. Enter “Diameter” under Name
5. Enter “cm” under units.
6. Click “Done”
7. Enter diameter data from lab, use the down arrow instead of enter.
8. Repeat steps 3-7 with circumference (cm) for the y-axis.
9. Move cursor to “Autoscale graph” under “Analyze” and choose “Autoscale from zero”.
10. Double click somewhere on the graph. Click on the box labeled “Connect Points” to remove the connecting line. Title the graph “Diameter vs Circumference”
11. Select a region of the graph (click and drag a box from the data point in the lower left to the data point in the upper right).
12. Click on “Linear Fit” under “Analyze”. Move the text box if it covers part of the line.
13. Click on the Text Window (lower left portion of screen). Enter the lab name, your names, the period, teacher, and any other relevant information.
14. Print a copy of the graph for each lab member.
DIAMETER VS AREA
15. Choose “New Manual Column” under “Data”.
16. Label as “Area” with units as “squares”.
17. Enter data.
18. Click and hold on the label “Circumference” on the y-axis.
19. Choose “Area”
20. Decide how you can linearize the graph (using graphing handouts).
21. Choose “New Calculated Column” under “Data”
22. Enter an appropriate new column name and unit.
23. Click and hold on “Variables (columns)”
24. Choose the axis you are going to change (in this case “diameter”).
25. Finish entering the formula (should say “diameter^2”)
26. Click on “Done”
27. Replace x or y axis with new modified data by clicking and holding on the axis label.
28. Double click somewhere on the graph. Title the graph “Circumference vs Area”
29. Move cursor to “Autoscale graph” under “Analyze” and choose “Autoscale from zero”.
30. If the curve is now a straight line, repeat steps 13-14.
31. If the curve is still not a straight line, repeat steps 20-27 until it is straight.