What are the two poles of a magnet called?

The two poles of a magnet are called the north (N) pole and the south (S) pole.

Fill in the blank: The area around a magnet where its effects are detectable is known as the ___.

Magnetic field.

True or False: Magnetic field lines can cross each other.

False. Magnetic field lines must not touch or cross each other.

Riddle: I connect opposite ends and never touch, guiding needles with my gentle touch. What am I?

Magnetic field lines.

How can a magnetic field be detected?

Fill in the blank: A compass contains a magnetized needle that aligns itself with a magnetic field and points in the direction of the ___.

Magnetic field.

What is the significance of the strength of a magnetic field?

The strength of a magnetic field is strongest at the poles of the magnet.

Multiple Choice: Which materials are typically attracted to magnets? A) Wood B) Iron C) Plastic D) Glass

B) Iron

Fill in the blank: For a bar magnet, magnetic field lines form loops from the north pole to the south pole, concentrated at the ___.

Poles.

The strength of a magnetic field is indicated by ___ of the field lines.

The density

What happens when two north poles of magnets are brought close together?

They repel each other due to their like poles.

Fill in the blank: Magnetic field lines form a ___ shape for a horseshoe magnet.

U

True or False: A north pole and a south pole of magnets repel each other.

False; they attract each other.

Riddle: I can attract or repel, depending on my kind. What am I?

A magnet

When opposite poles of magnets are aligned, the magnetic field lines point in the ___ direction, causing attraction.

Same

Approximately how many years ago did the Greek shepherd Magnes discover the attractive property of lodestone?

4,000 years ago

What is indicated by the closeness of field lines around a magnet?

The strength of the magnetic field is strongest where the lines are closest together.

The invention of the compass was significant for ___ in unfamiliar environments.

Navigation, enabling accurate direction-finding in environments like oceans and deserts.

True or False: The Earth's magnetic north pole is actually a magnetic north pole.

False. The Earth's magnetic north pole is actually a magnetic south pole.

Fill in the blank: The compass needle points toward magnetic ___, which is near the geographic north pole.

North

What role does the Earth's magnetic field play in the navigation of migratory birds?

It helps them navigate over long distances.

Riddle: I guide sailors and birds alike, aligning with north while floating light. What am I?

A compass

What causes the natural light displays known as auroras near the north and south poles?

Solar particles interacting with the stronger parts of the Earth's magnetic field.

The Earth’s magnetic field resembles that of a ___ with field lines pointing toward the magnetic north pole.

Bar magnet

True or False: Modern ships and airplanes exclusively rely on satellite navigation and do not use magnetic compasses.