Indiana Science Grade 8

Chapter 11: Magnetism

Section 1 Self-Check Quiz-Eng.

1.
The interaction between two magnets is called __________.
A)magnetic force
B)a magnetic field
C)polarity
D)current
2.
Which of the following is found in all magnets?
A)a geographic pole
B)a transformer
C)a north pole and a south pole
D)an electrical field
3.
North poles of magnets always attract __________.
A)south poles
B)other north poles
C)negative charges
D)positive charges
4.
Magnetic fields that surround all magnets exert __________.
A)the magnetic force
B)electric current
C)air pressure
D)resistance
5.
The __________ are regions where the magnetic force exerted by a magnet is strongest.
A)magnetic field lines
B)anodes
C)cathodes
D)magnetic poles
6.
Groups of atoms with aligned magnetic poles are called __________.
A)magnetic fields
B)elements
C)permanent magnets
D)magnetic domains
7.
Magnetic fields are created by __________.
A)spinning neutrons
B)magnetic field lines
C)potential energy of molecules
D)moving electric charges
8.
Magnetic field lines that curve away from each other show __________.
A)attraction
B)where the magnetic field is strongest
C)a magnetic domain
D)repulsion
9.
Iron is a magnetic material, but an iron nail does not behave like a magnet because __________.
A)its magnetic domains are arranged randomly
B)its magnetic domains are aligned
C)it contains too few magnetic domains
D)the atoms in the iron exert a force on all the other atoms
10.
The magnetic field that surrounds Earth is called the __________ .
A)magnetron
B)magnetic domain
C)magnetic polar region
D)magnetosphere
11.
The negatively charged particles in an atom are called __________.
A)electrons
B)protons
C)neutrons
D)negatrons
12.
What is responsible for generating Earth's magnetic field?
A)Earth's revolution
B)solar wind streaming toward Earth
C)movement of iron in the core
D)the Moon's strong gravitational pull on Earth
13.
How do homing pigeons use Earth's magnetic field to find their way?
A)They utilize GPS technology.
B)They pick up bits of magnetic material on their wings.
C)They have natural magnets on their feet.
D)They have natural magnets in their brains.
14.
Which of the following statements about Earth's magnetic field is true?
A)It is possible for Earth's magnetic field to reverse.
B)When molten rock cools, the iron in it no longer contains magnetic domains.
C)A magnetic pole is permanent but a geographic pole is not.
D)Earth's magnetic field extends about 10 m above Earth's surface.
15.
A(n) __________ is a magnetic needle that is free to move and that aligns itself along magnetic field lines.
A)pole
B)domain
C)compass
D)electromagnet
16.
Electric current passing through a wire produces __________.
A)a permanent magnet
B)a magnetic field around the wire
C)geographic poles
D)a compass
17.
Which of the following changes electrical energy into kinetic energy?
A)generator
B)transformer
C)superconductor
D)electric motor
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