Every Demo
an Experiment
Is Shaking needed
to make butter?
Better Bubbles --
Skim or Whole?
Make Milk Stiff
DNA Dance
Biotechnology in Food
DNA as Videotape
Menu for Workshops |
Making Butter From Cream:
Is Shaking Really Necessary?
(Part 4) |
Any other explanations, besides shaking?
How can you test these guesses? These Multiple Competing Hypotheses? |
| Compete and Compare, Head to Head, Side by Side |
| Take two vessels of cream; hold one in one hand, the other
in the other hand and shake only one for about 7 minutes. |
 |
Is this an experiment or a demonstration?
If both turn to butter, what do you conclude?
If neither turns to butter, what can you conclude?
If only the shaken one turns to butter, have you shown shaking is the key?
Have you shown that other explanations aren't the key?
Have you shown other factors aren't needed to turn cream into butter? |
| Go back to butter, part 2 |
| Go back to butter, part 3 |
| Go back to butter, part 1 | |
