Master of My Domains (Akiko Arevalo)

Author

Akiko Arevalo

Principle(s) Illustrated

Magnetism - objects containing iron can be turned into temporary magnets, each with north and south poles.

Standards

NGSS Science & Engineering Practices:
- Analyzing and interpreting data
- Constructing explanations (and designing solutions)
NGSS Cross-Cutting Concepts:
- Cause & Effect
NGSS Disciplinary Core Ideas:

- - PS2.B: Types of Interactions
  - Electric, and magnetic forces between a pair of objects do not require that the objects be in contact. The sizes of the forces in each situation depend on the properties of the objects and their distances apart and, for forces between two magnets, on their orientation relative to each other. (3-PS2-3)

Questioning Script

Prior knowledge & experience:

Students will know that magnets stick to iron and steel.

Root question:

"Why did the paper clip get pushed away from the nail?"

Target response:

Magnets stick to iron and steel because iron and steel can be turned into temporary magnets. The domains in the iron/steel reorient and "line-up" like the domains in the magnet. When the permanent magnet came in contact with the nail, the point of contact became the opposite pole of the magnet, and therefore, attracted. Similarly, when the magnetized nail came in contact with the paperclip, the clip in turn became a temporary magnet with opposite poles at the contact point. If the permanent magnet is removed, the nail retained its magnetic properties. However, when it was flipped over to the other pole and approached the nail, the nail realigned with the magnet, making the tip of the nail the same pole as the clip. Like poles on a magnet repel.

Common Misconceptions:

Magnets stick to metals (in general).

Photographs and Movies

References

F.O.S.S. (Full Option Science Systems)