Fill in the blank: Magnetite is a type of ___ magnet, while other magnets are made artificially from ___.

Natural; iron

True or False: The name 'magnetite' may originate from the place Magnesia, which is where these rocks were found.

True

What are the two main categories of magnets mentioned in the content?

Natural magnets and artificial magnets.

Fill in the blank: Magnets can be found in various shapes, such as ___ magnets and ___ magnets.

Bar; horseshoe

What is the significance of the shepherd Magnes in the context of magnet discovery?

He is credited with discovering magnets when he noticed his iron-tipped stick attracted to magnetite.

Multiple Choice: What is magnetite primarily known for?

A natural magnet that attracts iron.

Magnetic materials are attracted to a magnet. Name three examples of such materials.

Iron, nickel, and cobalt.

Non-magnetic materials include ___, ___, and ___.

Wood, plastic, and glass.

True or False: The magnetic field is weakest at the poles of a magnet.

False. The magnetic field is strongest at the poles.

What happens when iron filings are sprinkled around a magnet?

They align with the magnetic field, showing that the magnetic force is strongest at the poles.

Fill in the blank: The ends of a magnet are called the ___.

Poles.

What shape of magnet will still show iron filings gathering at the poles?

Any shape, including straight bar, horseshoe, or cylinder.

How do non-magnetic materials behave when brought close to a magnet?

They do not stick to the magnet and show no attraction.

What are the two ends of a magnet called, and which direction does each point when allowed to hang freely?

The two ends of a magnet are called the North-seeking end (North pole) and the South-seeking end (South pole). The North pole points north, while the South pole points south.

Fill in the blank: A freely hanging magnet will always point in the ___ and ___ direction.

North and South

True or False: Iron bars will behave the same way as magnets when suspended freely.

False. Iron bars do not behave the same way because they are not magnets.

Short Answer: How did ancient travelers use magnets to find their way?

Ancient travelers used hanging magnets that would align themselves along the North-South direction to navigate.

What invention followed the use of hanging magnets to help people find directions?

The compass, which has a magnetized needle that indicates the North-South direction.

Fill in the blank: Magnets always have a ___ and ___ pole, regardless of their shape.

North and South

What color is typically used to distinguish the North end of a compass needle?

The North end of the needle is usually painted a different color, often red.