5 Magnetism Unit Test Review

What does it mean when you see N and S on a magnet?

• magnetic poles

• electromagnet

• solenoid

• magnetic fields

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Which of the following are magnetic poles?

• North

• South

• Red

• Blue

• Positive

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Choose ALL of the materials that ARE magnetic.

• iron

• steel

• aluminum

• copper

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Which stone is a natural magnet that is derived (comes from) magnetite?

• lodestone

• limestone

• granite

• marble

What do two poles of the same type do when they are brought close together? Choose ALL that are true.

• Repel

• Push Away

• Attract

• Pull Towards

• Change Poles

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Which is the best explanation of a magnetic force that attracts or repels?

• Magnetic objects react to gravity along magnetic field lines.

• Magnetic objects experience forces applied on them by an electric current.

• Magnetic objects have magnetic fields of force that surround the magnet and come together at the poles.

• Magnetic objects attract or repel due to the force of charged particles.

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NGSS.MS-PS2-5

The field lines most concentrated around a bar magnet are at the _____.

What causes the Earth to have a magnetic field?

• The iron and nickel in the core of the Earth.

• The pull of gravity toward the equator from the poles.

• The tilt of the Earth's axis away from the sun.

• The amount of magnetite in the Earth's crust.

Which characteristic below makes a magnet seem like "magic?"

• The magnetic fields are invisible.

• All magnets can be turned off and on easily.

• When the opposite poles are close to each other they will jump apart.

• A compass needle will always point to the Geographic North Pole.

Where might you find an electromagnet?

• In a fluorescent light bulb.

• In an electric motor.

• In pieces of rock called magnetite.

• Hanging on your refrigerator door.