Magnets

1. what are some "real life" applications of magnetism?
Picking up dropped nails on construction sites so no one steps on them. Fridge at home to hang stuff up. Screwdrivers have magnets on them to attract end. Clothing censors. MRIs. Phones have things to do with magnets. Credit cards. roller coasters

2. what experiences have you had with magnets in your life?
Using magnets to push/attract mables. Picking up nails when fixing a roof.

3. What ideas do you have about science of magnets?
With magnets polar opposites attract. Posivitve and negative attracts. Positive/ positive and negative/negative repel.

4 types of magnetic elements
1. Iron
2. cobalt
3. nickel
4. B

Can pick up paper clips when holding a magnet without the paper clipls touching the magnets because they are within the magnetic field.

Can connect three papers together to a magnet then pull them off as a group and they will stay magnetized (aligning the electrons)

Post: How do the results compare with your predictions? How do you explain this?
 The results really conveyed my misconceptions about magnets.  I predicted that a lot more things wouldn't break the field that actually did. I got caught up thinking that if it conducted electricity that it had some sort of magnetic field.  I don't know where that came from but it was in my brain that way.  I remember magnetics from freshman year of high school.  Though I couldn't remember the specifics. I totally blanked on the questions my mind just wasn't prepared for this topic.

Post: "Play around" with the magnet and paperclip activity materials and see what interest you about them. What questions you come up with? What would you like to explore next? What don't you understand?

Questions: Why isn't the magnetic field broken once the magnet is pulled away from the paper clip? Does the magnetic field wear away after a certain time and how long does it take? Why do same poles repel?

I would like to explore how other magnetic fields last in other items compared to paper clips. I would also like to explore how electromagnets would because they sound interesting.

I understand that opposite poles attract and same poles repel but is the reason they repel have to do with the fact that the magnet works like a circuit and that putting an opposite pole at the end would just continue the circuit whereas putting the same pole would reverse the circuit? The force starts in the north pole and continues to the south pole and the force of both south poles against each other is enough to make them repel.

Why do some magnets look like this? Looks like it repels some of the filaments but it attracts others?

When other magnets have this effect on iron filaments.

The maglev train:
The guideway is the magnetized coil running along the track that repels the large magnets on the train.  Levitation occurs from this repelling process. The electric current is what pushes and pulls the train.  This current is what allows the train to reach up to 310 mph.  These trains can be found in Japan and China. The United states are trying to make a slightly slower version. This would train would have it's own specialized track which would cut down on train crossings.


learning block:
Physical Science: Content Standard B:
Light, Heat, Electricity, and Magnetism
Benchmarks: Magnets attract and repel each other and certain kinds of other materials.

Learning goals:

• there are four types of magnetic elements.
• Only the things containing the four types of elements can break the magnetic fields.

Learning performances:

• compare their predictions to the data they collected
• categorize objects based on if they contain magnetic elements or not (which would break the magnetic field).