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The Scientific Method

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by

Lewis Zhang

on 3 September 2013

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Transcript of The Scientific Method

The Scientific Method
Be curious
Research to see if you question has already been answered
Step 1: Ask Questions
Be detailed and specific
Take photos to review later
Step 3: Formulate a Hypothesis
A hypothesis is a proposed explanation to something
A hypothesis should provide a possible answer to your question and must be testable
Step 4: Design and Perform Experiments
Perform tests multiple times to confirm your results
Record experiment results step-by-step in a way that another person interested in performing your experiment can easily understand and follow each step in the experiment.
Search for evidence through tests
Use a control
After a sample of neodymium fell into a petri dish of E. coli, no more neodymium grew. I wondered why. I asked other people and checked the internet if anyone had results or conclusions explaining why, yet notably, this phenomenon had not been observed before.
Step 2: Make Observations
Example
I observed the petri dish and found that growth of the E. coli has been inhibited in a radius of approximately 0.7mm around the speck of neodymium.
Example
If magnetism was inhibiting E. coli growth, then concentrated magnetite would work equally well. I put magnetite into E. coli and it didn't inhibit growth of the bacterium.
I put neodymium in the E. coli to act as a control and it still inhibited the growth.
Experiment
Examples for
Drawing Conclusions
After trying the experiment multiple times, I found that magnetite didn't impact E. coli growth but neodymium did. Therefore E. coli is not affected by magnetism.
Step 5: Analyze data and come up with an explanation
by Vivek K. and Lewiz Z.
Now analyze the data in order to come up with a conclusion
Make sure to include both qualitative data and quantitative data when possible
Step 6: Form a Conclusion
Make sure to include an overarching conclusion, evidence (which is pure, unquestionable fact gained from the experiment), and reasoning, which is what you figured out from the evidence.
Example
Step 7: Question Your Answer
Have peers perform similar tests and see if they corroborate your results
Examine your tests to see if you made any errata
Example
I wanted to know what cased the inhibition of E. coli. My colleague discovered that all Rare Earth Metals inhibit E. coli.
Example Question: Will the magnetic properties of neodymium inhibit E. coli growth?
Example
Example Hypothesis: If something is inhibiting E. coli growth, then it is the neodymium's magnetic effect because the E. coli may be affected by magnetism.
THE END!
After trying the experiment multiple times, I found that magnetite didn't impact E. coli growth but neodymium did. Therefore. E. coli is not affected by magnetism.
Claim: When you put neodymium in an E. coli sample, the magnetic properties of neodymium are not what causes the E. coli to die.
Evidence: Magnetite didn't inhibit E. coli growth. Neodymium did.
Reasoning: If magnetic materials inhibit E. coli growth, then magnetite would inhibit E. coli the same as neodymium did. However, it did not.
Thanks for watching!
I hypothesize that the magnetic properties of neodymium have changed the workings of some cell structure inside E. coli.
Example Conclusion:
Full transcript