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Magnetism

In physics, magnetism is a force that can attract (pull closer) or repel (push away) objects that have a magnetic material like iron inside them (magnetic objects). Magnetism is a property of certain substances which pull closer or repel other objects.  Magnetism is caused by the motion of electric charges.


Lesson 1 (or “Day 1”) Material
Lesson 2 (or “Day 2”) Material
Lesson 3 (or “Day 3”) Material
Lesson 4 (or “Day 4”) Material

2:00 Magnetism: Motors and Generators

4:49 DC Motor, How it works?

4:43 How to Make a Simple MOTOR out of SPINNER

 


Compare Contrast and Debate

Background: Absolute North and magnetic North are not exactly the same. Maps and other directions are typically communicated using absolute North. This means that using a compass requires correcting the measurement for the declination (or difference) between the reading on the compass compared to absolute North.

  • Position A: Some people argue that maps should be created to align with magnetic North rather than absolute North so that no correction is required to use a compass.
  • Position B: Others believe that the way maps are constructed – to align with absolute North – are appropriate, and that correcting for the declination of magnetic North is not that difficult to do.

Resources Documents and Links


Special Notes and Notices

Instructor Emphasis:

  • Science & Engineering Practice: Develop and use models.
  • Cross-Cutting Concept: Cause and Effect: Mechanisms and explanations.