Magnetism and Compass Fundamentals

The video tutorial explains how sailors navigate using a compass, which was invented when people in Magnesia discovered that lodestone points north. It describes how to make a simple compass using a magnetized needle and cork. The Earth's magnetic field is also discussed, explaining how it influences compass needles to point north and south.

What natural material did people in Magnesia use to find directions?

• Iron

• Lodestone

• Gold

• Copper

How did early navigators use lodestone to determine direction?

• By hanging it from a string

• By floating it on water with a cork

• By burying it in the ground

• By heating it

What is needed to make a simple compass at home?

• A glass needle

• A magnetized needle

• A wooden needle

• A plastic needle

What happens to a needle when it is rubbed with a magnet?

• It becomes non-magnetic

• It becomes magnetized temporarily

• It becomes heavier

• It changes color

Why does a compass needle point north?

• Because of the Earth's magnetic field

• Because of the wind

• Because of gravity

• Because of sunlight

What is the Earth compared to in terms of magnetism?

• A non-magnetic object

• A piece of wood

• A big magnet

• A small magnet

What are the two poles of a magnet called?

• Top and Bottom

• East and West

• North and South

• Left and Right

What effect does the Earth's magnetic field have on a compass needle?

• It makes the needle point east

• It makes the needle spin continuously

• It aligns the needle to point north-south

• It has no effect