Writing a Lab Report for IB Bio.ppt
-
Upload
nick-ritchie -
Category
Documents
-
view
97 -
download
3
Transcript of Writing a Lab Report for IB Bio.ppt
Title Page
• Title of your project is the same as your research question
• Include Name, date, school and school ID: 001282
Abstract
• Summary of your lab• Approximately 200 words
http://classweb.gmu.edu/biologyresources/writingguide/Abstract.htm
Background information
• What should the reader know about your topic?
• How did you develop your research question?• Cite your sources!
Prediction/Hypothesis
• Try to write this as an “If…then…because….”statement
• DO NOT write, “I think” or “We think”
Variables
• Independent• Dependent• Controlled/Fixed- Explain how you will be
controlling them• List all of these so they are clear to the reader
Materials
• List them and be specific–Ex: 1- 100 ML Beaker– 250 ML of tap water– 20 cm long dialysis tubing
Procedure/Method/Protocol• Write a detailed procedure in list
form• You can include diagrams or pictures
of your lab setup or instruments used
Raw Data
• Include only data collected during the experiment, no averages
• Include quantitative and qualitative data• Include units and uncertainties • Tables should be clearly labeled with
captions..and should be able to stand alone…see next slide
Diffusion Rate (S/cm/s) at various Temperatures(0C) ±. 10C
Trial # 50 75 95
1
2
3
4
Diffusion rate was measured indirectly by measuring conductivity rate of the solution using a Vernier conductivity probe and calculating the slope of the most linear region of the graph. The uncertainty for the probe is _______
Table 1 The diffusion rate of 50% salt solution at 4 different temperatures.
Helpful Hints for making a table
• Be certain that your table can stand alone• Refer to all tables by numbers in your text. e.g
according to table 1• Always provide units and uncertainties in table
headings• Align decimal places and maintain decimal places
and/or sig figs• Too many rows or columns could make it difficult to
understand..tables should consolidate data not make it more confusing
Processed Data• This is where you place all of your calculations
including descriptive statistics..mean/mode/sd as well as some advanced statistics.
• There should be tables and graphs• You must include at least 1 graph...make sure you
use the appropriate graph…look in the frog book for some help
• Include error bars on your graph. You can use standard deviation or standard error of the mean. MAKE SURE YOU INDICATE WHAT YOUR ERROR BARS REPRESENT.
Graphing
Temperature and Diffusion
0
20
40
60
80
100
Temperature
Dif
fusi
on
rat
e
Label
Label
Fig. 1 Temperature and diffusion. This shows the averages of 10 samples…..
Error Bars
http://www.ncsu.edu/labwrite/res/gt/gt-stat-home.html
http://www.saburchill.com/IBbiology/ICT/dataprocessing/020.html
Advanced statistics
• T Test• Chi Square• Pearson Correlation• ANOVA• Other tests
http://click4biology.info/c4b/1/stat1.htm
Conclusion
• State a clear conclusion based on analyzed data
• Refer to your hypothesis. Was is supported by data or refuted? DO NOT STATE THAT YOUR DATA PROVES ANYTHING!
• Discuss all graphs, charts.
Evaluation
• Evaluate weaknesses and limitations– What limited your ability to complete the lab
successfully? Describe at least 3
• Improvements– What would you do differently next time?
Describe at least 3 improvements