Show:
What is Magnetism
Magnets
Charge and Static
Electric Current
Battery
100
What is a magnet?
Any material that attracts iron and materials that contain iron.
100
How do Earth's magnetic properties explain how a compass works?
A compass aligns itself with Earth's magnetic field.
100
What is static discharge?
The loss of static electricity as electric charges transfer from one object to another.
100
What is an electric circuit?
A complete, unbroken path through which electric charges can flow.
100
What is a combination of two or more electrical cells in a series called?
A battery
200
How can the behavior of two magnets show the presences of a magnetic force?
They will either attract or repel each other.
200
How are Earth and a bar magnet simliar?
-Both have north and south poles -Both have a magnetic field
200
Rubbing a balloon on fabric is an example of what method of transferring?
Friction
200
What charge do protons and electrons have?
Protons- positive Electrons- negative
200
Who built the first electric battery?
Alessandro Volta
300
What area of a magnet has the strongest magnetic effect?
the poles
300
What might happen to a metal pair of scissors if rubbed in one direction with the north pole of a magnet?
It will become magnetized.
300
What is electric force?
The attraction or repulsion between electric charges.
300
What materials make good conductors and insulators?
Conductors- water, silver, aluminum, iron, copper Insulators- sand, wood, rubber, glass
300
What did Volta use to create his battery?
Zinc, silver, and paper soaked in salt water.
400
What are the three properties of a magnet?
1. Magnets attract to iron and materials that contain iron. 2. Magnets attract or repel other magnets. 3. One part of a magnet will always point north when allowed to swing freely.
400
Why might an inexperienced explorer get lost using a compass?
As a result of magnetic declination, north on a compass is not the same as the geographic north pole.
400
What do the lines represent in an electric field diagram?
The strength of the field
400
What unit is used to measure voltage?
volt (V)
400
Would a current by produced if both terminals had the same charge? Explain your answer.
No. The terminals must have opposite charges.
500
Give 2 ways magnets can be changed.
-Breaking magnets -Heating magnets
500
Describe the magnetic domains in a magnetized material.
They are all pointing the same direction.
500
Name and define the three methods of transferring charges.
Friction- transferred by rubbing Conduction- transferred by direct contact Induction- movement of electrons from one object to another
500
Why can't an electric current exist if an electric circuit is broken?
If the circuit is broken, electricity cannot flow through.
500
What are the parts of an electrochemical cell?
Electrodes and electrolytes