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.