Graph Info for Labs: In your lab book: For Lab Report:

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Graph Info for Labs: In your lab book: For Lab Report: Sketch the graph (title, labeled axes, general trend shown) Write equation describing linear fit (substitute appropriate variables and include units for slope and y-intercept) For Lab Report: Autoscale graph from Zero (0,0 origin) Check point protectors in graph options Uncheck connect points in graph options Copy and paste graph to a Word Document and Save

Linear equations for Scientific plots: Start with generic y = m x + b Replace y, and x with chemistry variables from the graph axes; replace m and b with values from analysis of graph for slope and intercept. What are the numbers missing? Add Units!!!

Linear equations for Scientific plots: Decide if b (y-intercept) is significant: 5% Test: (Y-max = largest y value from data table) Rule: if intercept is less than or = 5% of max Y value, the intercept is negligible and you may drop it from the equation; if intercept is greater than 5% of max Y value, it is significant and you must keep it as part of the final equation. Write the final equation of the line

Percent Error How far off the results are from the actual value Percent error = |observed – actual| X 100 actual

Mass & Volume Report Experimental Background Complete all sections Apparatus and Method sections: Include materials. Labeled apparatus sketch in ink Detailed procedures, as developed and used by your group (include any refinements)

Mass & Volume Report Data Collection: Data Processing Include Quantitative data you took as a group (RAW data). Include Qualitative data Use titles and headings! (include units and uncertainty) Precision will be checked for. Data Processing Table with class data (indicated in title) for your metal only Graph class data of only your metal (not both) Line of best fit Include equation under the graph and discuss it in the conclusion. % error calculation

Mass & Volume Report Conclusion Make conclusions based on results. (i.e. what trend does the graph show? What relationship exists? How was it modeled?) Explanation/Justification: What does the slope of the line mean? What is it called? Was your slope value too high? Too low? Explain!

Mass & Volume Report Evaluation (very important!) – make two paragraphs following the conclusions Identify the limitations of the procedures and materials Discuss how these limitations affect the results How could these things be improved to better the experiment?