An invisible area of force that surrounds a magnet.

A force that requires direct physical contact.

The visible light given off by a magnet.

The electrical charge stored inside a magnet.

They show the direction of the force from north to south.

They show the direction of the force from south to north.

They mark the areas where the force is weakest.

They represent the physical wires inside the magnet.

The iron filings will form a pattern of lines from the magnet's north pole to its south pole.

The iron filings will only gather at the exact center of the magnet.

The iron filings will be pushed away and will not stick to the magnet.

The iron filings will arrange themselves in a straight line across the magnet.

Opposite poles pull toward each other, while like poles push away from each other.

Like poles pull toward each other, while opposite poles push away from each other.

Both like and opposite poles will always pull toward each other.

The north pole of a magnet is always stronger than the south pole.

The force becomes weaker as the distance between the magnets increases.

The force becomes stronger as the distance between the magnets increases.

The distance between the magnets does not affect the magnetic force.

The force only exists when the magnets are touching each other.

Flipping one magnet so that its south pole faces the other magnet's north pole.

Moving the two magnets closer to each other.

Replacing one of the magnets with a stronger magnet.

Moving the two magnets farther apart from each other.

A permanent magnet found in nature.

A temporary magnet created by an electric current.

A material that blocks magnetic fields.

A device that generates electricity from magnetism.

The strength of the magnet decreases.

The strength of the magnet increases.

The magnet changes its polarity.

The magnet becomes a permanent magnet.

Decrease the number of wire turns and decrease the electric current.

Increase the number of wire turns and decrease the electric current.

Decrease the number of wire turns and increase the electric current.

Increase the number of wire turns and increase the electric current.

When two repelling magnets are pushed closer together

When two attracting magnets are held in place

When a single magnet is at rest

When a magnet is broken into two pieces

It is converted into kinetic energy, causing the magnets to move.

It disappears completely from the system.

It becomes stronger, holding the magnets in place.

It is transferred to the surrounding air as heat.

Applying a greater force to push the magnets closer together before release.

Using larger magnets that are farther apart.

Coating the magnets with a different material.

Releasing the magnets more slowly.

To make sure the test is fair by only changing one factor at a time.

To make the experiment less expensive to conduct.

To help predict the outcome before the experiment begins.

To ensure the dependent variable is changed intentionally.

The independent variable is changed to see its effect on the dependent variable.

The dependent variable is changed to see its effect on the independent variable.

Both variables are kept constant to ensure a fair test.

Both variables are measured to see if the experiment is working.

The number of wire coils.

The measured launch speed.

The mass of the car.

The conclusion of the experiment.