A
A form of energy that involves the flow of electric charges is called______________________.
electricity
All matter is made up of tiny particles that have electric charges. The tiny particles are called _____________.
atoms
When electric charges build up on the surface of an object, ______________________ occur.
static electricity
A material that allows electricity to flow through it easily is called _________________________-.
a conductor
An object that attracts certain metals is called __________________________.
a magnet
A magnet does not need to touch a metal object in order for the magnet to move the object because of the magnet's _____________________________.
magnet field
The invisible magnetic field can be observed by sprinkling ________________________ around the magnet.
iron filings
Objects with the same kind of electric charge _________________________ each other.
repel
The pushing or pulling force caused by a magnet is called _________________________.
magnetism
The area around a magnet where the force of the magnet can act is called the ___________________________________.
where the force of the magnet can act is called the ___________________________________.
magnetic field
A magnet's magnetism is strongest at the ______________________.
poles
A magnet that forms when electric current flows through a wire that is wrapped around a piece of metal is called an __________________________.
electromagnet
(T/F)
The only electric charge that can move from object to object is a positive charge.
False
(T/F)
In current electricity the negative charges have a continuous flow through a material.
True
(T/F)
An electromagnet can be made stronger by increasing the electric current flowing through the electromagnet's wire.
true
(T/F)
The magnetism of a bar magnet is temporary because it has a switch that turns electric current on and off. `
False