Review of Fourth Grade STARTING WITH ELECTRICITY.

Review of Fourth GradeSTARTING WITH ELECTRICITY

Electricity & Materials

What are negative charges called?


Electrons


A continuous flow of negative charges is otherwise known as

what?


Electricity


What are the TWO units that are used

to measure electricity?


Voltage and Amperes

(Volts and Amps)


What is the voltage of a common DRY CELL

battery?


1.5 VOLTS


What is a DRY CELL?

Describe it.


A dry cell is a type of battery that contains

chemicals in the form of a paste.


What is a WET CELL?

Describe it.


A wet cell is a battery that contains

chemicals in the form of a liquid.


What is a CONDUCTOR

?


A conductor is a type of material that EASILY allows electricity to

flow through it.(Usually a METAL)


What is an INSULATOR?


An insulator is a material that DOES NOT

ALLOW electricity to flow through it.

(usually a plastic or rubber)


The path taken by an electric current is known

as what?


A Circuit


What three things must a circuit have

to work?


1. An energy source (battery)

2. Wire so the current can move.

3. Something to use the electricity. (Light Bulb)


What is a

closed circuit?


A circuit that can work. (It allows the

movement of electricity)


What is an open circuit?


It is a circuit that is “broken” or not complete, so the electricity cannot

travel completely through.


What is a

SERIES circuit?


It is a circuit where the

electricity only has one path

to follow.


What is a parallel circuit?


A type of circuit where the electricity has more than one

path to follow.


In a magnet, where is the magnetic force the greatest?


Around the poles

(top and bottom)

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