Vocabulary
The ends of a magnet are called __________
Poles
True or false. Magnets attract objects made of glass.
False
Which would be attracted to a magnet? A plastic button, a wooden toothpick, a rubber band, or a paper clip?
A paper clip
Electricity is the flow of ______.
Electrons.
What materials are needed to create an electromagnet?
A power source (battery), wire, metal core (nail)
An object with a force that can attract or repel certain materials is called a ________
Magnet
True or false. Magnets attract materials made of rubber.
False
Which pair of magnetic poles attracts one another?
Opposites!! One north, one south
___________ are gained or lost to produce an electrical charge.
Electrons
Electricity produces a _______.
magnetic field
A closed path around which electricity can flow
circuit
True or False. Magnets attract objects made of plastic.
False.
Objects become magnetic when their what align?
Domains
Jeremy moves a magnet inside a copper wire coil. What does he generate?
Electric current
Which of the following electromagnets will pick up the most paperclips?
A. Electromagnet with 30 coils
B. Electromagnet with 50 coils
C. Electromagnet with 80 coils
C. Electromagnet with 80 coils
Increasing the amount of coils will increase the strength of the electromagnet.
A region of magnetic force around a magnet is a ______.
Magnetic field
True or false. Magnets attract materials made of ferromagnetic metal.
True.
When a north pole and north pole of two magnets are near each other they will ________.
Repel
What is an open circuit?
When there is a gap in the circuit and electricity can't flow
Name one real-world electromagnet
Motors, door bells, generators, etc.
A magnet created from the flow of electricity.
Electromagnet
What material does a magnet attract?
Iron, nickel, cobalt
How does the distance that an object is from a magnet affect the magnetic force on the object?
The farther away, the less magnetic force.
Name two ways to increase the strength of an electric field in a circuit.
Shorter wires, higher voltage (more batteries)
Name at least two different factors that can affect the strength of an electromagnet.
Amount of current, voltage, size of wire, material wire is made from, etc.