The Earth's Magnetic Field Flashcards

All 6 cards in this deck

What does a magnetic compass contain?

A small bar magnet, free to turn.

When no other magnet is nearby, what direction does a compass needle point in?

In the direction of the Earth's magnetic field (its north-seeking pole points towards geographic north).

What is the behaviour of a compass evidence for?

That the Earth has its own magnetic field, so the Earth's core must be magnetic.

True or false? The magnetic field that makes a compass point north is produced in the Earth's atmosphere.

False. It is produced inside the Earth, which is evidence that the core is magnetic.

How does a compass needle behave when it is placed in the magnetic field of a bar magnet?

It lines up with the field, pointing along the field line from the magnet's north pole towards its south pole.

True or false? The needle of a magnetic compass is a permanent magnet.

True. It is a small bar magnet that keeps its own magnetic field.