Student Notes Experimental Design/Scientific Method Name:Class:

Observation and Inference Observation –Any information collected with the _______________ –What are the 5 senses? –The skill of __________________ Inference –Conclusions based on _________________ –The process of _______________ from given __________. What do you observe about the 2 sets of tracks? What do you infer about the 2 sets of tracks? 2 nd slide – New observations? New Inferences? 3 rd Slide – Draw a final conclusion.

Title and Hypothesis Title –Should be _______ or ________ at the beginning of every experiment. –The title should be answered in your ___________. –Always should be written as “The effect of ______ on _____. Hypothesis –A ________________ –How to write a hypothesis: –Use an ______, _________ statement. –If the _______________ changes then the _______________ changes. Examples:

Variables – Independent and Dependent Independent Variable –What you are ___________ in an experiment –The _________ –Changed on _________________. –How many Independent Variables should you have in your experiment? Dependent Variable –What you are ____________ in an experiment –The ___________. Example: IV – DV – IV – DV -

Control and Constants Control –Used for _____________ –The __________________ group. –Does the control group ever change? Constants –Materials in your experiment that are the _______ in both the control and the experimental group. –Does this ever change? –Why not? Examples: Control: Constants:

Procedure Your procedure must be: 1.In a ____________________ format 2.Very ______________ 3.__________________ Why must your procedure be so detailed?

Self Check – Experimental Design 1.IV 2.IV 3.IV 4.IV 5.IV 1.DV 2.DV 3.DV 4.DV 5.DV

Data –Qualitative or Quantitative Qualitative –Recorded as an _________________. –Example: Quantitative –Recorded in ________________. –Example:

Tables and Graphs Are they the same? Do you have to have both? The Pirate ShipTAILS T A I L S DRY MIX

What kind of graph should I use? Line Graph – Bar Graph/Histogram – Scatter Plot – Pie/Circle Graph – Picture Graph -

Results Summary Summarize your data into ___ sentence. Shows ________ in your data. Example: THIS IS NOT THE SAME AS A CONCLUSION!

Conclusion – Answer these questions in a paragraph. 1.What was the purpose of the experiment? 2.What were the major findings? 3.Was the hypothesis supported by the data? 4.How did your findings compare to your classmates? 5.What happened that you did not expect? Why do you think this happened? 6.How would you improve this experiment next time? 7.What recommendations do you have for further study?

2 kinds of research Descriptive –Based on ___________. –Examples: –What kind of data do you think is usually collected? Experimental –The ___________ and ____________ of variables. –Examples: –What kind of data do you think is usually collected?

Testing Medication Vocab. Trial – you should have _______________ in your experiment Sample Size – the ______________ in an experiment Placebo – a “________________” used as a __________. Contains no drugs – usually made of sugar

Clinical Trials must have…. 1.___________ or permission from the subjects 2.______________ or payment for time, transportation, inconvenience 3.The subject must be ___________ of all risks involved