I realised there are many resources on the web and because I don't systematically keep them, I often spend loads to time searching for something that I came across before. So I decided to start keeping track of them (hm....and hopefully) update them regularly, so I don't have to spend loads of time searching for them.
Topic 1 Measurements
1.1 Physical Quantities and units
Possible Lesson Flow
12 Jan 2015
Today I observed a great lecture by my colleague, Arthur. Really liked the way he progressed through the lesson. So I decided to document it here, briefly.
Lecture Outline
1. What is Science and Physics ?
- systematic enterprise (scientific method)
- testable explanations + predictions -> experimentation.
2. What is Scientific method:
- Based on observations forming testable hypothesis -> predictions which is testable by experimentation.
- After many cycles of experimentation if the hypothesis works then we form theories.
- Arthur used a very interesting example of apple falling from tree and an invisible string that holds the apple to the Earth.
3. What do we do in experimentation?
- Measure (apparatus) / Calculate and collect and analyse scientific data and reach conclusions
4. Physical Quantities and Units
- Many of the data that we collect in physics are quantifiable.
- Brings us to what is a physical quantity.
- What can we do with physical quantity :
- Law of Homogeneity of equations can be introduced here.
- Comet and probe exercise on what physical quantities are we interested in.
Video Resources:
Video 1 : Redefining the mass (1 kg) - the roundest object on earth.
- A beautiful video to be used on teaching the base quantities and units.
- Discusses about how calibration standards change.
- And how amongst the 7 fundamental quantities, only mass is still defined in terms of a carefully kept prototype in France and the problems with it.
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