### Scientific Method & What To Include in a Lab Write-Up

posted Nov 10, 2014, 10:50 AM by Britta Reinertsen   [ updated Dec 2, 2015, 7:31 AM ]

#### Scientific Method WRITE UP notes

Problem/Challenge
• Make an observation
• Qualitative observation uses senses (It feels cold)
• Quantitative observation uses numbers and deals with quantity (It is 10 degrees cooler today than yesterday)
• Write a testable question or problem (need to be able to measure something)
Hypothesis - An educated guess as to what will happen in our experiment
• If...then...because statement
• EXAMPLE: If we drop 2 objects off the table then they will hit the ground at the same time because gravity causes all objects to fall at the same speed.
Procedure - Instructions on how to do the experiment
• Numbered Steps 1)  2)  3)
• First step should be "Gather materials and set up"
• Include number of trials to be completed
• Include Variables
• Control - What stays the same in the experiment
• Independent - What's being tested
• Dependent - What's being measured
Materials/Safety
• List items in order of use
• Consider any safety concerns (depending on the lab there may not any)
Procedure Changes/Plan 2
• Sometimes our original procedure needs to be changed or we run out of time and have to change or reduce the number of trials.
• ANY changes you make to the original procedure need to be written in this section
• If time allows...retest and record new data
Data
• A table or chart should be used to record data, including a column/row for averages.
• Tables should include detailed labels so the reader understands the information
• A unit of measure should be included next to any number
• Add data to the charts as you test, NOT at the end of the experiment

Graph
• Horizontal Axis should be the independent variable, Vertical axis should be the dependent variable
• Graphs should be in color, evenly spaced, and labeled

Analysis - Write & think about the data
• Make sure you use units of measure next to each number
• Calculate averages (SUM DIVIDED by the number of trials)
• Low & High scores for each variable
• Identify any unusual data with possible explanation
Conclusion - Summary of data/experiment
• Write in complete sentences
• Use bullets to organize information
• Discuss how many trials
• Explain what the results are telling us (use numbers in the explanation, average, high/low)
• Restate control, independent, and dependent variables
• Discuss unusual data & errors
• Restate hypothesis, state accuracy of hypothesis using data to support statement.
Future Experiments
• Changes you would or could make to the experiment NOT changes to your behavior
• New TESTABLE questions you have after completing this lab (the new questions should be related to the original question)
ĉ
Britta Reinertsen,
Nov 10, 2014, 10:50 AM