## In a magnetic field, a compass will line up .

This is because the earth’s magnetic fields are like large magnets that can affect compasses in many ways.

For example, if you hold a compass over an area where there is also a magnetic field present (such as near power lines), it will point to the nearest magnet and not true North! A compass in a magnetic field will line up .

If you hold it over an area where there is also a magnetic field present (such as near power lines), the needle will point to the nearest magnet and not true North!

When a compass is near power lines, the needle will point to the nearest magnet and not true North! (this sentence needs revision) In general, there are three types of magnetic fields:

“true North,” __., and Earth’s magnetic field. If you hold your compass over an area where there is also a magnetic field present (such as near power lines), it will point to the nearest magnet and not true North.

## This can make navigating difficult in some cases!

There are three types of magnetic fields: “true north,” __., and earth’s magnetic field.

The first two do not affect compasses but if you hold your compass over an area with a second type of powerful electromagnetic force nearby.