The Earth's Magnetic Field Flashcards

All 5 cards in this deck

What is the behaviour of a magnetic compass evidence for?

That the Earth's core is magnetic, producing the Earth's own magnetic field.

Why does a compass needle align with the Earth's magnetic field?

The needle is a small magnet, so it rotates until its poles line up with the field.

True or false? The Earth's magnetic field is caused by the atmosphere.

False. It is produced by the Earth's magnetic core.

How can a plotting compass be used to show the Earth's magnetic field?

Place it away from any magnets or iron and note that the needle always settles pointing north–south.

Which magnetic pole must lie near the Earth's geographic North Pole?

A magnetic south pole — it attracts the north end of a compass needle.