Test - Magnetism

Front

What do the rocks that are magnetized in the direction of Earth's field reveal?

Back

That the north and south magnetic poles of Earth have exchanged places many times in Earth's history.

Front

What do magnets attract besides other magnets?

Back

Nails, tacks, paper clips, and many other metal objects.

Front

What is the world's smallest magnet?

Back

Electrons.

Front

Which of the following describes the behavior of magnetic field lines around a bar magnet?

Back

They start from the north pole and end at the south pole outside the magnet.

Front

What is the purpose of magnetic field lines?

Back

To help visualize a field and to provide a measure of the strength of the magnetic field.

Front

Define magnetism.

Back

Magnetism is a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.

Front

What are the two types of magnetic poles?

Back

North pole and south pole.

Front

What happens when like poles of magnets are brought together?

Back

They repel each other.

Front

What happens when opposite poles of magnets are brought together?

Back

They attract each other.

Front

What is a magnetic field?

Back

A magnetic field is the region around a magnet where magnetic forces can be observed.