1. Interaction between two magnets, called magnetic __________, increases as magnets move closer together.
- forces
2. A magnetic __________, which exerts the magnetic force, surrounds a magnet, and is strongest __________ to the magnet.
- field; closest
B. Magnetic Field
1. All magnets have a __________ pole and a __________ pole.
- north; south
2. Like poles __________; unlike poles __________.
- repel; attract
3. Earth has magnetic poles.
a. A compass needle is a small bar magnet that can freely __________.
- rotate
b. A compass needle always points __________.
- north
C. Magnetic materials—__________, cobalt, and nickel
- iron
D. Magnetic domains—groups of atoms with __________ north and south poles
- aligned
E. To magnetize, like the poles of all the domains point in the __________ direction.
- same
F. __________ magnets are made by placing a magnetic material in a strong magnetic field, forming a large number of magnetic domains in the top.
- Permanent
Section 2 Electricity and Magnetism
A. Moving charge and magnetic fields
1. Moving charges, like those in an electric current, produce a __________ field.
- magnetic
2. The magnetic field around a current-carrying wire forms a circular pattern about the wire.
a. The direction of the field depends on the __________ of the current.
- direction
b. The __________ of the magnetic field depends on the amount of current flowing in the wire.
- strength
Parent Tip: Review the logic above to help your child master the concept of magnetism and its uses worksheet.
