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Chapter 5
Electricity and Magnetism
24
Science
4th Grade
12/05/2011

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Cards

Term
A circuit that has only one path
Definition
a series circuit
Term
A continuous flow of negative charges through a material
Definition
current electricity
Term
A material that allows electricity to flow through it easily
Definition
a conductor
Term
A material that does not allow electricity to flow through it
Definition
an insulator
Term
A temporary magnet formed when electric current flows through a wire coiled around a metal core
Definition
electromagnet
Term
An object that can attract iron
Definition
magnet
Term
An object with nine - charges and three + charges
Definition
negatively charged
Term
An unbroken path through which negative charges can flow
Definition
circuit
Term
Causes a magnetic field
Definition
when a current flows through a circuit
Term
Every circuit has _____ and _____
Definition
an unbroken path and a power source
Term
Examples of things that use an electromagnet
Definition
fire alarms, telephones, televisions, CD players, computers, doorbells
cranes, maglev trains
Term
Has more than one path
Definition
a parallel circuit
Term
Have a north pole and a south pole
Definition
magnets
Term
Objects that have the same number of positive and negative charges
Definition
neutral
Term
Objects that have the same number of positive and negative charges
Definition
neutral
Term
Produces electricity by using a coil of wire and a magnet
Definition
generator
Term
Reduces the amount of electricity that can flow through a material
Definition
resistor
Term
The area around a magnet where the force of the magnet can act
Definition
magnetic field
Term
The continuous flow of negative charges through a material
Definition
current electricity
Term
The ends of a magnet
Definition
poles
Term
The pushing or pulling force caused by a magnet
Definition
magnetism
Term
Ways magnets can be used to produce electricity
Definition
by moving a magnet through a coil of wire
by moving a coil of wire through a magnetic field
Term
What electric power plants use to make generators work
Definition
water
steam
wind
Term
Where a magnet's magnetism is strongest
Definition
at the magnet's poles
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