How can we help?

You can also find more resources in our Help Center.

42 terms

3rd Grade Electrical Circuits

STUDY
PLAY
circuit
A complete or partial path through which an electrical current may flow.
energy
The ability to do work; various forms exist such as heat, electrical, chemical, and light energy.
interaction
Objects acting on or influencing each other
matter
Anything that takes up space, has mass, and has properties which can be observed.
prediction
to state what you think will happen
system
A group of interacting objects.
terminal
points which must be touched in order to make a complete circuit.
base terminal
The soldered knob at the bottom of a bulb that must be touched in order to complete a circuit.
bulb
A system which transforms electrical energy into light energy.
filament
a resistant wire in a bulb which transforms electrical energy into light energy.
insulator
A device to prevent the passage of electricity often called a nonconductor; for example the glass bead which holds the support wires apart in a bulb.
side terminal
The metal section of the base of a bulb, just below the glass, which must be touched in order to light the bulb.
support wire
Wire that extend up through a bulb, with a filament connecting the two.
battery holder
A device designed to hold a battery and make it easier to attach wires to the battery.
bulb holder
a device designed to hold a bulb and make it easier to attach wires to the bulb.
conserve
To avoid waste.
Fahnestock clip
A metal device which allows wires to be held in place.
switch
A device in an electrical circuit that opens and closes the circuit.
electrician
A person who installs, maintains, and repairs electrical equipment.
schematic
A diagram showing how something is put together, for example a wiring diagram.
symbol
A written sign that represents a part of an electrical circuit in a schematic.
wiring diagram
A drawing using symbols to show how a circuit is put together.
negative terminal
One of the parts of a battery that must be connected in a closed circuit, labeled (-).
polarity
In batteries, the condition of having positive and negative ends which must be aligned correctly for the batteries to be in series or parallel.
positive terminal
One of the parts of a battery that must be connected in a closed circuit, labeled (+).
closed circuit
A complete circuit, where electricity flows from one battery terminal, through the circuit and back to the other battery terminal
open circuit
A circuit through which electricity does not flow because one part is not connected; for example, a circuit in which the switch is open or a bulb is burned out.
series circuit
A circuit that has only one path through which electricity can flow.
parallel circuit
A circuit which provides multiple paths through which electricity can flow.
voltage
A unit used to measure electrical energy.
conduct
To move from one place to another; for example; wires conduct electricity.
conductor
Material through which energy moves; copper wire is a good conductor of electricity.
tester
A device that is used to check if items conduct electricity.
nonconductor
A material that generally does not allow the movement of electricity through it.
solution
A clear, liquid system of two or more substances which can only be separated by evaporation.
gauge
The unit of measurement to identify thickness of wire; the smaller the number, the thicker the wire.
resistance
A property of a material which describes how much it restricts the flow of eletricity. For example, Nichrome wire is more resistant than copper wire.
Nichrome wire
A wire that has a relatively high resistance and heats up as an electrical current runs through it.
rheostat
A device that can change the resistance in a circuit, such as a dimmer switch.
energy transformation
When energy is changed from one form to another, for example a battery changes chemical energy to electrical energy.
short circuit
An accidental connection between two points in an electrical circuit which allows electricity to follow a different path of low resistance.
fuse
A strip of easily melted metal placed in a circuit as a safeguard.