Magnetized Needle Compass
Needle turns to roughly north-south.
Teaching & key ideas
What you do: Magnetize needle, float it, and let it settle.
What students see: Needle turns to roughly north-south.
Why it works: A magnetized needle aligns with Earth's magnetic field.
Question to ask: What invisible field is turning the needle?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: What invisible field is turning the needle?