Which of the following correctly describes magnetism:
A. Like poles of a magnet contract, while opposite poles
expand
B. Like poles of a magnet attract, while opposite poles repel
C. Like poles of a magnet expand, while opposite poles
contract
D. Likes poles of a magnet repel, while opposite poles attract
What is D. Like poles of a magnet repel, while opposite poles attract?
300
1) this early invention sent signals through electric wires and included electrical pulses from an electromagnet so people could have long distance communication
2) fine-tuned this invention and developed this special code of communication
What is a telegraph and who is Samuel Morse?
400
the area of attraction surrounding a magnet
What is a magnetic field?
400
an item that could be used to make a circuit incomplete
What is an insulator?
400
type of wire that conducts electricity best
What is a thick wire?
400
The magnetic fields of any magnet are greatest around:
A. only the south pole
B. the middle
C. both poles
D. only the north pole
What is C. both poles?
400
Michael Faraday contributed the following to science (Mention all that apply):
A. converted electrical energy into mechanical energy
B. was the first to discover electricity
C. determined that electricity can be made by moving a
magnet in a coiled wire.
D. invented the electrical generator and electrical transformer
Who A. converted electrical energy into mechanical energy C. determined that electricity can be made by moving a
magnet in a coiled wire AND D. invented the electrical generator and electrical transformer?
500
A parallel circuit (Mention all that apply):
A. One path for electricity to follow
B. More than one path for electricity to follow
C. All lightbulbs go out if one bulb goes out
D. Lightbulbs stay lit if one bulb goes out
What is B. More than one path for electricity to follow AND D. Lightbulbs stay lit if one bulb goes out?
500
Could ALL conduct electricity to complete a circuit
A. eraser, wire, screw
B. paper clip, paper, glass
C. penny, plastic, screw
D. screw, paper clip, penny
Explain what a compass is and why it always points North
What is A compass has a magnetized metal needle that can spin freely and always points North. Earth is like a giant magnet. It has magnetic poles, north and south. The North pole has a South magnetic force, so the north end of the compass needle attracts toward that South magnetic force at the North pole.(opposites attract)?
500
Physicist who discovered electromagnetism and sparked Faraday's interest in the science field 2) definition of electromagnetism
Who is Hans Christian Oersted and what is electric currents that create magnetic fields?