Collect RA Prologue
Quiz on sig figs, rounding, Pythagorean Theorem
Review scientific method:
Question
Hypothesis
Experiment
Conclusion - Model
Intro to Material Science
Humans used fire 500,000 years ago
Learned to make it 15,000 years ago
Why so long?
Imagine all "processed" materials disappeared. What are your basic needs? How would you meet them?
You need to use materials to match the function.
Class discussion.
Theme for Material Science Mini-Unit: What can the physical properties of a material tell us about the structure of the material?
Stiffness of Paper Lab
Question: Does the orientation of the rectangle cut from the paper depend on its orientation?
Hypothesis + reasoning based on background info:
Do the experiment.
Data Table.
Make a conclusion. Try to explain results with a model.
Discussed results.
Model of pasta bridges.
Paper is made of long fibers.
Balloons also made of long chains. Demo of balloon skewers.
Another example is polarizers. Demonstrate on overhead and with picket fence model.
All of these involve long chain molecules called polymers (many + parts)
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