What happens when like magnetic poles come close to each other?

They create an electric current

What does a compass needle do?

It turns to line up with Earth's magnetic field

It points toward the geographic north pole

It always points toward the sun

What happens to the magnetic domains of an iron rod when it is brought near a magnet?

They align in the direction of the magnetic field.

They remain in a random arrangement.

After an iron rod that has been heated or dropped is sliced into three pieces, what will be the arrangement of the magnetic domains?

The domains will be in a random arrangement.

The domains will be aligned in the direction of the magnetic field.

The domains will be permanently aligned.

The domains will form a single large domain.

What does the term "electromagnetic force" refer to?

B) The interaction between electric charges and magnets

A) A single wire wrapped into a cylindrical wire coil creating a strong magnetic field

C) A device that uses an electromagnet to measure electric current

D) The flow of electric charges in a wire or any conductor

Define "solenoid" as per the document.

C) A single wire wrapped into a cylindrical wire coil creating a strong magnetic field

A) A device that changes electrical energy into mechanical energy

B) The flow of electric charges in a wire or any conductor

D) The attractive or repulsive force between electric charges and magnets

According to the document, what is an electric motor?

D) Device that changes electrical energy into mechanical energy

A) A temporary magnet made by wrapping a wire coil carrying a current around an iron core

B) The flow of electric charges in a wire or any conductor

C) Device that uses an electromagnet to measure electric current

What does a nearby magnet cause the wire to do in an electric motor?

To be pushed or pulled, depending on the current flow

Why are electromagnets useful to humans?

They are temporary magnets that can be turned on and off.

They are permanent magnets that cannot be turned off.

They are natural phenomena that occur without human intervention.

They only function in outer space.

What is the scientific meaning of voltage difference?

Related to the force that causes electric charges to flow; measured in volts (V)

Device that increases or decreases the voltage of an alternating current

Electric current that flows in only one direction

Large wheel that rotates when pushed by steam, wind, or water

What is electromagnetic induction?

Generation of a current by a changing magnetic field

Device that increases or decreases the voltage of an alternating current

Electric current that flows in only one direction

Large wheel that rotates when pushed by steam, wind, or water

Device that transforms mechanical energy into electrical energy by electromagnetic induction

Device that increases or decreases the voltage of an alternating current

Related to the force that causes electric charges to flow; measured in volts (V)

Electric current whose direction is reversed in a regular pattern

Large wheel that rotates when pushed by steam, wind, or water; often connected to a magnet for generating electricity

Device that increases or decreases the voltage of an alternating current

Related to the force that causes electric charges to flow; measured in volts (V)

Electric current that flows in only one direction

What is direct current (DC)?

Electric current that flows in only one direction

Generation of a current by a changing magnetic field

Device that transforms mechanical energy into electrical energy by electromagnetic induction

Large wheel that rotates when pushed by steam, wind, or water

What is alternating current (AC)?

Electric current whose direction is reversed in a regular pattern

Device that increases or decreases the voltage of an alternating current

Related to the force that causes electric charges to flow; measured in volts (V)

Large wheel that rotates when pushed by steam, wind, or water

What is a transformer?

Device that increases or decreases the voltage of an alternating current

Generation of a current by a changing magnetic field

Electric current that flows in only one direction

Large wheel that rotates when pushed by steam, wind, or water

What is the role of turbines in the process of creating electrical energy from mechanical energy?

They convert mechanical energy into electrical energy.

They induce electrical energy directly.

They are powered by the generator.

They are used to store electrical energy.

What do both step-up and step-down transformers have in common?

Both have primary and secondary coils

Both have coils wrapped around different iron cores

Both have secondary coils with fewer turns than primary coils

Why are power lines carrying electrical energy at a high voltage?

To reduce heat created by the electrical resistance of long wires

To increase the electrical resistance of the wires

To decrease the voltage level for electrical appliances

To stop the current when the handle stops turning

What is a likely hypothesis students will make about the location of the magnetic pole in relation to the geographic pole?

The magnetic pole is 1500 km from the geographic pole

The magnetic pole is at the exact same spot as the geographic pole

The magnetic pole is on the opposite side of Earth from the geographic pole

The magnetic pole moves constantly and cannot be predicted

How can the position of the magnetic pole be represented in relation to the geographic pole?

By superimposing it on a map of the geographic pole

By calculating the distance using mathematical formulas

By marking it with a flag on the actual location

What can provide power for instruments during the expedition to find the magnetic pole?

Hydroelectric power or geothermal energy

Chapter 7 Magnets

Authored by Jacob Bellissimo

Science

9th Grade

NGSS covered

Used 56+ times

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34 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the north pole of a compass point to?

Earth's north magnetic pole

Earth's south magnetic pole

The equator

Directly upwards

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of energy do windmills change into electrical energy?

Chemical energy

Kinetic energy

Thermal energy

Nuclear energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the term "electric field" refer to?

A region where a magnet's force is strongest

A group of atoms with aligned magnetic poles

An area of activity; an area in which a magnet has influence

Surrounds an electric charge and exerts a force on other electric charges

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a "magnetic pole"?

A group of atoms with aligned magnetic poles

Properties and interactions of magnets

An area of activity; an area in which a magnet has influence

A region where a magnet's force is strongest

Tags

NGSS.MS-PS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a "magnetic domain"?

Something that exerts a force on magnets and objects made of magnetic materials

A region where a magnet's force is strongest

Properties and interactions of magnets

A group of atoms with aligned magnetic poles

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What do magnets apply to other objects or magnets?

Only repulsive force

Only attractive force

Attractive or repulsive force

Gravitational force

Tags

NGSS.MS-PS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the interaction of two magnets change?

It does not depend on their orientation

It decreases as they move closer together

It increases as they move closer together

It remains constant regardless of distance

Tags

NGSS.MS-PS2-3

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Chapter 7 Magnets

What does the north pole of a compass point to?

What type of energy do windmills change into electrical energy?

What does the term "electric field" refer to?

What is a "magnetic pole"?

What is a "magnetic domain"?

What do magnets apply to other objects or magnets?

How does the interaction of two magnets change?

Where is the magnetic field the strongest on a magnet?

What happens when like magnetic poles come close to each other?

What does a compass needle do?

Access all questions and much more by creating a free account

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