Magnets and magnetic fields

Name the two poles on a magnet:

north-seeking pole and south-seeking pole

Which poles attract and which poles repel?

* North-seeking poles repel north-seeking poles
* South-seeking poles repel south-seeking poles
* North seeking poles attract south seeking poles

Name four magnetic materials:

* Iron
* Steel
* Cobalt
* Nickel

magnetic force

Non contact force from a magnet on a magnetic material.

How does the force’s strength change with distance from the magnet?

The force is stronger the closer you are to magnet.

magnetic field lines

Imaginary lines that show the direction of a force on magnetic material

two ways you can find the shape of a magnetic field

* Plotting compasses
* Iron filings

What does a bar magnet line up with?

The Earth’s magnetic field

What does the needle of a plotting compass and iron filings line up with?

magnetic field

If the magnetic field lines are closer together what does this show?

The magnetic field is stronger

What will happen if a magnetic material is placed in or rolled through a magnetic field?

It will experience a force

There is a magnetic field around a __ with a _____ flowing in it.

There is also a magnetic field around a wire with a current flowing in it.

If you hang a magnet up it will line up in a direction pointing north to south. Why?

This is the magnetic field of the Earth

Explain why the needle of a compass always points in the same direction wherever you point it in a room.

A compass needle always points in a north–south direction. The compass needle lines up in the Earth’s magnetic field (which does not change)

Draw a pattern