Which of the following is an example of magnetic attraction?

When a magnet attracts iron filings, it demonstrates magnetic attraction.

When a non-magnetic material attracts iron filings, it demonstrates magnetic attraction.

When a magnet repels iron filings, it demonstrates magnetic attraction.

When a magnet attracts plastic, it demonstrates magnetic attraction.

Which of the following is an example of magnetic repulsion?

Two magnets with their north poles facing each other

Two magnets with their opposite poles facing each other.

What factor(s) determine the strength of a magnet?

Temperature, pressure, and density

How does the Earth act as one big magnet?

Due to its magnetic core of molten iron and nickel and it's rotation

True or False: Bigger magnets are always stronger magnets. Explain why.

False; size alone doesn't determine strength, it depends on material and condition of magnet.

True; size directly correlates with strength.

False; bigger magnets are always weaker.

True; bigger magnets have more magnetic fields.

True or False: Opposite poles and/or charges will repel one another. Explain why.

False; opposite poles and/or charges attract.

True; opposite poles and/or charges attract

How does a compass work?

It aligns with the Earth's magnetic field, pointing north-south.

It aligns with the Earth's rotation, pointing north-south.

It aligns with the Sun's magnetic field, pointing east-west.

It aligns with the stars, pointing north-south.

What is static electricity?

Buildup of electrons on an object

Discharge of electricity through lightning

Continuous flow of electric current

Why does friction cause static electricity to occur?

Friction generates excess electrons, leading them to jump to another object and build up on that object.

Friction generates excess protons, leading them to jump to another object and build up on that object.

Friction generates excess neutrons, leading them to jump to another object and build up on that object.

Friction generates excess photons, leading them to jump to another object and build up on that object.

Explain how you can get a magnet to levitate, or hover over one another.

By using magnetic repulsion, where like poles of magnets repel each other.

By using magnetic attraction, where opposite poles of magnets attract each other.

By using static electricity to repel the magnets.

By using gravity to keep the magnets in place.

Explain why you can be “shocked” when you touch a doorknob after walking on carpet with socks on.

Friction between socks and carpet causes a buildup of static electricity on your body, which discharges when you touch a conductive object like a doorknob.

Friction between socks and carpet causes a buildup of light on your body, which discharges when you touch a conductive object like a doorknob.

Friction between socks and carpet causes a buildup of heat on your body, which discharges when you touch a conductive object like a doorknob.

Friction between socks and carpet causes a buildup of magnetism on your body, which discharges when you touch a conductive object like a doorknob.

What is ferromagnetic?

materials that are strongly attracted to magnets

materials that have no effect on magnets

materials that are only attracted to plastic

What is an electromagnet?

A temporary magnet produced by passing an electric current through a coil of wire

A magnet made by aligning magnetic domains in a material

A magnet that always points to the north pole

A magnet that only attracts non-metallic objects

What makes an electromagnet different from a permanent magnet?

An electromagnet can be turned on and off by controlling the flow of electric current, while a permanent magnet is always magnetic.

An electromagnet is always stronger than a permanent magnet.

An electromagnet is made of different materials than a permanent magnet.

An electromagnet cannot attract metallic objects.

Explain non-contact forces.

Forces that act at a distance without physical contact between objects, such as magnetic and electric forces.

Forces that require physical contact between objects, such as friction and tension.

Forces that only occur in outer space.

A student places one magnet above another magnet as shown below. Which of the following explanations best describes why the top magnet appears to float above the bottom magnet?

The poles of the two magnets are the same (south and south or north and north) and, therefore, are repelling one another.

The gravitational pull is acting differently on both magnets so they are floating at different heights.

The magnets are made of different materials and, therefore, are not magnetic.

The poles of the two magnets are different (south and north or north and south) and, therefore, are attracting one another.

A student tests several types of magnets. Which factor could best help her compare the strengths of different magnets?

The distance the objects are from the magnets when they are attracted.

The types of materials that are attracted to the magnets.

Maglev trains travel by hovering over magnetic train tracks instead of rolling along on wheels. Select 2 of the following that must be true about Maglev.

A strong magnetic field is able to levitate the train.

Maglev would work if magnets were used.

There must be contact between the rail and the train in order for Maglev to work.

Maglev wouldn't work if magnets were used.

An iron screwdriver became temporarily magnetic after it was exposed to a strong magnet. How did the screwdriver become temporarily magnetic?

The magnetic domains in the screwdriver were temporarily aligned by the presence of the magnet.

Magnetic domains formed in the metal of the screwdriver when it was exposed to the magnet.

The force exerted by the screws made the magnetic domains in the metal of the screwdriver line up.

The magnet erased the magnetic domains in the screwdriver.

If you cut a magnet in half, what happens to the poles?

Both halves get a North pole and a South pole

One half gets the North Pole, the other half gets the South pole

Both halves get only a North Pole

Both halves get only a South pole

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

Add more coils of wire to the nail

Reverse the poles of the magnet

Remove all the coils and the nail

What would happen if you took one end of the wire off the battery?

The nail will no longer be a magnet

Electricity and Magnetism

Authored by Latoya Wilson

Science

6th - 8th Grade

NGSS covered

Used 5+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a magnet?

an object that produces a magnetic field and attracts certain materials like iron, nickel, and cobalt.

A type of battery

A type of wire used in circuits

a type of rock found in the mountains.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why does the Earth have magnetic fields?

due to the movement of molten iron in its outer core.

Due to its large size

caused by the rotation of the Earth on its axis.

because of the gravitational pull from the moon.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What charge does an electron have?

Negative

Neutral

Positive

Proton

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is magnetic force?

The force that makes objects float

The force of attraction or repulsion between two magnets

The force of gravity on two objects

The force of friction

What is an electric force?

The force of attraction or repulsion between electrically charged objects.

The force of magnetism between two objects

The force of friction between two surfaces

The force of gravity between two objects

What is magnetism and how is it created?

Magnetism is a type of sound; it's created by vibrations

Magnetism is a type of light; it's created by the sun

Magnetism is a type of electricity; it's created by flowing electrons

Magnetism is a non-contact force; it's created by electrons spinning in the same direction.

How are the poles of a magnet bar labeled?

East (E) and West (W)

Left (L) and Right (R)

Up (U) and Down (D)

North (N) and South (S)

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Electricity and Magnetism

What is a magnet?

Why does the Earth have magnetic fields?

What charge does an electron have?

What is magnetic force?

What is an electric force?

What is magnetism and how is it created?

How are the poles of a magnet bar labeled?

Which of the following is an example of magnetic attraction?

Which of the following is an example of magnetic repulsion?

What are the areas around the poles and surrounding magnets called?

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