Vocabulary
Name an item that a magnet can be stuck to.
Refrigerator (several answers accepted)
Who discovered the d-cell?
Hans Christian Oersted
What is a motor that runs on a d-cell?
Direct-current motor
What is the wire made of that we use in experiments?
Copper.
Name an electric device.
Doorbell, speaker, generator, headphones.
Magnetism is a force. What is a force?
A push or pull.
Name two classes Oersted studied in college.
Chemistry, astronomy, physics, and math.
Name an example of a simple motor.
Tin can.
False.
Speakers use electric currents to produce motion.
What is a vibration?
A quick back-and-forth movement.
What happened when Oersted closed the electric circuit?
A compass needle that happened to be on the table rotated.
What does a wire coil become when it connects to a D-cell?
Electromagnet.
When the circuit is broken, which direction does the compass needle point? (North, South, East OR West).
North.
Where does the electricity in your home come from?
Generator.
What is an electromagnet?
A piece of iron that becomes a temporary magnet when electricity flows through coils of insulated wire wrapped around it.
Through Oersted's discovery of the compass needle rotating, what did the flow of electric current produce?
Magnetic field.
Fill in the Blank: When the shaft rotates, contact between the D-cell and electromagnet is ____________.
Broken.
Name one way to make an electromagnet stronger.
Adding more coils, increase the amount of electric current flowing through the wire, wrap thicker wire around the coil.
What is the name of the hammer being hit in a doorbell?
Box Terminal, Striker, Electromagnet, Striker Terminal
Striker.
What is electromagnetism?
A property of electric and magnetic fields that causes interactions with electric charges and currents.
Stronger.
The shaft gets ____________ of little magnetic pushes every second. **hundreds, thousands, ten thousands.
Hundreds.
How do you make an electromagnet?
Put an iron core, like a rivet, in the center of the coils, the strong magnetic field will induce magnetism in the iron.
A speaker has two main parts. Name them.
Coil of insulated wire and permanent magnet.