Question

A group of students plans to make a small compass using a blunt sewing needle. What is the next step they should perform with the needle?

A.
heat it on a candle flame

B.
press it between two hard surfaces

C.
scratch it on a steel spoon

D.
rub it on a bar magnet

Answer 1

D. Rub it on a bar magnet.

Rubbing (stroking) the needle repeatedly in one direction with a bar magnet magnetizes it by aligning its magnetic domains, turning it into a compass needle.