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- ...:::Let's Save Our Earth! by Meg Anderson...::: on 2009-12-17
- 16 Golden Retrievers Explain Atoms is Today's BIG Thing in Technology - DEC 16, 2009 on 2009-12-17
- Science Education at Jefferson Lab on 2009-12-09
- VDOE :: Curriculum Framework on 2009-12-01
- RubiStar Home on 2009-12-01
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AMAZING MAGNETS on 2009-12-01
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- Stroke the needle on the north pole of horseshoe magnet from the center to the tip, always moving in one direction. Stroke the needle up to 30 times. Repeat these directions going from center of the needle to the eye of the needle on the south pole of the magnet. Check its magnetism with iron filings. If the needle picks the filings up, it is magnetized.
- Tape the center of the needle to the flat piece of cork and place it in a plastic bowl filled with water. What happens to the needle? Move the cork; what happens to the needle now?
- Have students write in their journals (Appendix I), and hypothesize why the needle is continuing to turn in a north/south direction. Students should remember in Lesson Five that opposite poles attract, therefore, the north pole of the compass will face the South Pole of our Earth and the south pole of the magnets will face North Pole of our Earth.
- Allow plenty of time for students to experiment with their compasses and write in their journal. Once each child has completed the above, bring the class outside to an open area. Using a real compass, mark north, south, east and west on the pavement with chalk. Encourage students to find northeast, southeast, northwest and southwest.
- Have students try their created compasses with the "pavement compass."
- Students should be given enough time to experiment with their compass and the real compass. Students should be able to record north, south, east and west in their journals.
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- TPCK - Technological Pedagogical Content Knowledge - TPCK on 2009-11-30
- The Metiri Group on 2009-11-30
- Virginia Society for Technology in Education on 2009-11-30
- Convex Polygon Definition - Math Open Reference on 2009-11-20
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