Download - Investigating magnetism
![Page 1: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/1.jpg)
Investigating Magnetism
DSVS Spring 2011Eighth Grade
Lab 1
![Page 2: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/2.jpg)
Introduction
• Introduce yourself• Explain what DSVS is and what it aims to do• Spend time engaging the students in conversation
about science, college, Davidson, etc.• Spend a maximum of 30 minutes on this before
beginning the labs• Tailor this presentation to the needs and interests
of the class. If they’re bored, move on.
![Page 3: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/3.jpg)
The Activities
• Suggested Activities for Magnetism are – 4. Making a Magnet– 5B. Directional Properties of Magnets– 7. Magnetic Fields– 8. The Interaction of Magnetic Fields
Be prepared to cut activities if you run out of time.
All this information can be found in the student worksheets and instructor guide that comes with your equipment kit.
![Page 4: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/4.jpg)
Preliminary Discussion
• Ask: What substances will a magnet attract?– Answer: Substances made of iron, steel, nickel and
cobalt
• Ask: Are all parts of a magnet able to attract with equal strength?– Answer: No. The ability to attract is centered in
each end of the magnet. These are called the poles.
![Page 5: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/5.jpg)
4. Making a Magnet (A)
• Have the students rub one end of a bar magnet on a steel needle
• They must go in the same direction each time, using the same side of the magnet
![Page 6: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/6.jpg)
4. Making a Magnet (A)
• Have them test if the needle is magnetic by holding it near another uncharged needle
![Page 7: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/7.jpg)
4. Making a Magnet (B)
• Begin by assembling the battery.
• Use size four, size D batteries. Insert them in the plastic sleeve.
• Insert one of the metal tabs between each battery
• Tape the two at the ends
![Page 8: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/8.jpg)
4. Making a Magnet (B)
• Wrap a nail in the copper wire.
• Leave a tail off each end• Strip the ends of the
copper wire, scissors work just fine.
• Students will likely need help with this.
• You might consider doing this for them ahead of time.
![Page 9: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/9.jpg)
4. Making a Magnet (B)
• Hook the nail to the battery, completing the circuit as shown.
![Page 10: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/10.jpg)
4. Making a Magnet (B)
• Have the students tests the nail for magnetism.
• Explain the relationship between current and magnetism.
![Page 11: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/11.jpg)
5B. Directional Properties
• Have the students charge a needle as in 4A.
• Tape it to the cork and set afloat in water.
![Page 12: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/12.jpg)
5B. Directional Properties
• Compare the direction of the needle to a compass.
• What happens when a magnet is placed near the needle?
![Page 13: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/13.jpg)
Discussion Questions• Did the magnet always come to rest in the same
direction?– Yes
• Which direction is the magnet pointing in according to the compass?– It points in a N-S direction.
• Did the needle act like a compass?– Yes
• Why is it important to make sure the magnet is far away from the compass?– The magnet will attract the compass.
![Page 14: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/14.jpg)
7. Magnetic Fields
• Place a magnet in a plastic bag on top of a brightly colored piece of paper.
• Scatter iron filings over the top.
• Tell students not to waste the filings.
• What does the pattern mean?
![Page 15: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/15.jpg)
8. Interactions of Magnetic Fields
• Repeat, this time using two magnets with opposite poles near.
• Try several arrangements of the magnets.
![Page 16: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/16.jpg)
Discussions Questions
• Have students draw the field lines shown by the iron filings.
![Page 17: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/17.jpg)
Wrapping Up
• Clean Up• Discuss the experiments with the class.• Answer any student questions.• Conclude the lesson.• Remind them you’ll be back next month.
![Page 18: Investigating magnetism](https://reader035.vdocuments.us/reader035/viewer/2022062418/55593836d8b42a4f3d8b4c9b/html5/thumbnails/18.jpg)
References
These activities and discussion questions are from:• “Investigating Magnetism”• John M. Rogan, Pd.D., Western Montana College• Hubbard Scientific Inc. Chippewa Falls, Wisconsin
Training slides and photos• Lerin Rutherford