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MAGNETISM AND ELECTRICITY
STUDY GUIDE
VOCABULARY:
D-cell: a source of electricity
induced magnetism: when an object becomes magnetized and can
attract other objects because it is stuck to a permanent magnet
switch: open and closes a circuit
insulators: are materials that do not allow electricity to flow
through it
conductor: a material that allows electricity to flow through it
prediction: an educated guess based on data or previous
experience
circuit: a pathway through which electric current flows
components: the individual items in a circuit
FACTS TO KNOW:
A motor is not needed in an electromagnet; however, a battery
(or power source) is needed.
A soup can will stick to a magnet but WILL NOT conduct
electricity.
Wire wound more times on the core will make an electromagnet
stronger.
In a parallel circuit, each bulb has its own pathway to the power
source. For example, Christmas lights that remain lit when one
bulb goes out is an example of a parallel circuit.
A series circuit can have more than one receiver but all receivers
will turn off when the wires are disconnected from the battery
(or power source).
The distance between a magnet and another object can affect
the strength of the magnetism.
The needle on a compass points toward a magnet.
A penny and a basketball hoop are conductors of electricity
because they are made of metal with iron in it.
Two magnets can attract (pull together) or repel (push apart) by
using the north and south poles.
In order for a circuit to be complete, it must have a power source
and a receiver.
This is a schematic drawing of a series circuit. The symbols
are labeled for you.
These are all examples of parallel circuits. If one light turns
off the other will stay on.