- Listen to today's lesson
- Read the following link
http://www.sciencetech.technomuses.ca/ENGLISH/schoolzone/Info_Magnets.cfm#super
- Skim the following link
http://en.wikipedia.org/wiki/Magnetite
- Answer the following questions; do your own research if necessary.
1. List some examples of magnetic materials and non magnetic materials. Are all metals magnetic?
2. What is a magnetic domain?
3. Define temporary (or soft) magnet, permanent (or hard) magnet and electromagnet.
4. In the article there is a reference to superconductors. Are they referring to electromagnets? How so?
5. What is the name of the rock made mostly of magnetite?
6. What is the North Pole on the earth a north pole of a magnet?
7. Why do you think that the earths magnetic field protects us? From what?