Show:
Founder of Electromagnetism
Electric Current and Magnetism
Solenoids
Electromagnets
S.T.E.M. Fair
100
Hans Christian Oerstad
Who discovered that whenever a current is produced in a wire, the compass needles line up in a circle?
100
magnetic field
What does an electric current produce?
100
The field can be turned on or off, have its direction reversed, or have its strength changed.
What are the three characteristics of a magnetic fields?
100
Electromagnet
What is a solenoid with a ferromagnetic core called?
100
Question
What is used to guide a S.T.E.M. investigation?
200
The University of Copenhagen
What is the name of the school where Oerstad taught?
200
electromagnetism
What is the name of the relationship between electricity and magnetism?
200
Earth's magnetic field
What magnetic field cannot be turned on or off?
200
Hundreds or thousands of times stronger.
What is the strength level of an electromagnet compared to a current alone?
300
1820
What year did Oerstad discover a connection between electricity and magnetism?
300
north
What is the direction that a compass needle points?
300
Reverse the direction of the current.
What is how do you change the direction of a magnetic field?
300
Increase the current, add more loops, or wind the coils closer together.
What are three ways to increase the strength of an electromagnet?
300
Hypothesis
What is an educated guess, or opinion, of what is predicted to happen in a S.T.E.M. investigation?
400
A compass
What is the tool used to determine directional north?
400
Earth's magnetic field
What does a compass align itself?
400
Increase the number of loops or coils in a current.
What is how do you increase the strength of a magnetic field?
400
Audiotapes, videotapes, computer hard drives, and credit cards.
What are some common electromagnets?
400
Procedures
What are the steps to a S.T.E.M. investigation?
500
Denmark
What is the name of the country where Oerstad lived?
500
Only magnets and electric currents
What can produce a magnetic field?
500
solenoid
What is a coil of wire with a current?
500
A doorbell.
What is the most commonly used electromagnet installed in every house.
500
December 6th
What is the date when S.T.E.M. Fair projects and boards are due?