A student claims that Earth has a magnetic field. Which evidence would best support the student's claim?

Question

Responses

The student rolls a ball down a large hill and the ball comes to a complete stop at the bottom.
The student rolls a ball down a large hill and the ball comes to a complete stop at the bottom.

The student receives a shock after walking across the carpet and touching a doorknob.
The student receives a shock after walking across the carpet and touching a doorknob.

The student creates a working circuit that illuminates a bulb using wire and a battery.
The student creates a working circuit that illuminates a bulb using wire and a battery.

The student turns in all directions with a compass and the needle always points north.

Answer 1

The best evidence to support the student's claim that Earth has a magnetic field is:

The student turns in all directions with a compass and the needle always points north.

This observation directly demonstrates the existence of a magnetic field, as a compass needle aligns with Earth's magnetic field lines, consistently pointing towards the magnetic north.