In a small iron particle made of 200 atoms, the north poles of 100 atoms are pointed right and the north poles of another 100 atoms are pointed left. Which statement describes the net magnetic force exerted by the iron particle?

The net magnetic force is about zero.

The net magnetic force is less than zero.

The net magnetic force is 100 times stronger as the force of the atoms.

The net magnetic force is 200 times as strong as the force of the atoms.

The attractive force between two magnets increases. Which statement explains why this would happen?

The unlike poles of the magnets are pointed at each other and move closer together.

The like poles of the magnets are pointed at each other and move farther apart.

The like poles of the magnets are pointed at each other and move closer together.

The unlike poles of the magnets are pointed at each other and move farther apart.

Kim has two bar magnets. First, she places them beside one another, as shown in Picture A. Then, she moves one of the bar magnets so they are placed as shown in Picture B. How did the magnetic force change?

The bars go from repelling each other to the second bar rotating.

The bars go from attracting each other to repelling each other.

The bars go from repelling each other to attracting each other.

The bars go from attracting each other to the second bar rotating.

Which of these determines whether or not a material is magnetic?

the alignment of atoms in the material

the weight of the material on Earth

the number of elements that make up

A student claims that all magnets have two magnetic poles. Which of these observations would best support her claim?

When a bar magnet is cut in half, each half has a north pole and a south pole.

Iron is attracted to a magnet but not to other pieces of iron.

The north pole of a compass needle is attracted to the south pole of a bar magnet.

The strength of the magnetic force from a bar magnet decreases as the magnet is pulled away from another object.

Angela tries to pick up a copper penny using a bar magnet, but the penny does not move. Next, she tries to pick up an iron nail using the bar magnet, and the nail lifts up toward the magnet. Which of the following best describes a ferromagnetic material like iron?

Ferromagnetic materials have magnetic domains that align with a magnetic field.

Ferromagnetic materials do not conduct electricity.

Ferromagnetic materials always produce a magnetic force.

Ferromagnetic materials are nonmetals that produce magnetic forces.

A magician wants to use magnets to create a new illusion for her show. She plans to hide strong magnets in her shoes and inside a special rug on the stage. When she tests the illusion, she finds that her shoes stick to the rug. What will happen if she flips the poles of the magnets in each of her shoes?

Her shoes will float above the rug.

Her shoes will still be stuck to the rug.

Her shoes will no longer be affected by the rug.

Her shoes will stick to each other instead of to the rug.

Why can some objects be magnetized by rubbing one pole of an existing magnet in one direction along the object?

The motion of the existing magnet against the object aligns the magnetic domains of the object.

The motion of the existing magnet against the object scrambles, or unaligns, the magnetic domains of the object.

The motion of the existing magnet against the object generates an electric current that transforms the object into an electromagnet.

The motion of the existing magnet against the object wears away the object’s surface, exposing the naturally occurring magnets underneath.

If the two magnets were cut in half along the line between the red and blue pain, which statement would describe the four bars that are produced?

Each piece would have a north pole and a south pole.

Each piece would have one magnetic pole and a nonmagnetic pole.

Two pieces would only have south poles and the other two pieces would only have north poles.

Which statements describe the iron-containing rock and the nails?

Most of the magnetic domains in the rock are aligned with each other.

The nails are attracted to magnets.

Most of the magnetic domains in the rock are randomly oriented.

The end of one bar magnet is placed near the end of another bar magnet. The two ends seem to push each other apart. Which of these statements is true?

There are like charges on the two ends.

There are unlike charges on the two ends.

Why are certain materials, such as copper and aluminum, not magnetic?

The magnetic fields of the individual atoms that make up the materials cancel each other out.

The individual atoms that make up the materials do not have magnetic fields.

The individual atoms that make up the materials align themselves into domains.

The magnetic fields of the individual atoms that make up the materials are highly unstable and easily lost.

Which of these is an example of a force that acts at a distance?

A magnet is pushed away when it is brought near the end of another magnet.

An airplane experiences friction as it moves through air.

A book experiences a normal force as it rests on a table.

A soccer ball experiences a force as it is kicked across a field.

When Bethany walks across a carpet, her socks pick up many electric charges. Later in the day, these charges are no longer present on her socks. What most likely happened to the charges?

The charges transferred to another object.

The charges broke apart into smaller particles.

During a lightning storm, the bottom of a cloud gains a strong negative electric charge. Which of these describes the charge at the top of a tall metal pole directly under the cloud?

The top of the pole would have a positive charge.

The top of the pole would have no charge.

The top of the pole would have a negative charge.

The charge of the pole would not be affected by the charge of the cloud.

This image shows two circular objects. Each object has an electric charge, as shown. Which statement describes the force that is exerted on the objects due to their electric charge?

There is a force pushing the objects away from each other.

There is a force pushing both objects to the left.

There is a force pulling the objects toward each other.

There is no force on the objects due to their electric charge.

The diagram shows two pairs of charged objects. Objects A and B are interacting with each other, and objects C and D are interacting with each other. Based on the diagrams, which statement is true?

The electric force between A and B is greater than the electric force between C and D.

There are no electric forces because the charges in each pair of objects cancel.

The electric force between A and B is smaller than the electric force between C and D.

The electric force between A and B is identical in magnitude to the electric force between C and D.

What happens when a rubber rod is rubbed with a piece of fur, giving the rod a negative charge?

Negative charges are moved from the fur to the rod.

Negative charges are moved from the rod to the fur.

Negative charges are added to the rod, and the fur remains neutral.

Positive charges are removed from the rod, and the fur remains neutral.

The distance between a positively charged object and a negatively charged object increases. If everything else remains constant, what happens to the electric force between the objects?

The electric force remains constant.

There is not enough information to answer this question.

All charged objects create an electric field around them. What two factors determine the strength of the two electric fields upon the charged objects creating them?

how charged the object creating the field is and the distance between the two charged objects

how charged the object creating the field is and the mass of the two charged objects

how charged the object creating the field is and whether the objects are positively or negatively charged

how charged the object creating the field is and the density of the two charged objects

Which of these best describes electric charge?

a fundamental property that causes electric and magnetic interactions

a force that causes objects to heat up

a high-voltage material that can cause damage to objects

a particle that moves freely through matter and causes static electricity to build up on objects

The wall did not seem to have a charge until the negatively charged balloon was put near it. How did the wall become charged?

Positive charges in the wall moved to align with the balloon's negative charges.

The wall transferred electric charges to the balloon.

The balloon transferred electric charges to the wall.

The wall gained positive charges to balance the balloon's extra negative charges.

Which statements describe how the electric force affects the balloons? Choose all that apply.

The balloons are pushed apart by the electric force.

If the balloons move closer together, the electric force acting on them increases.

The balloons are pulled together by the electric force.

The balloons stick together once they are touching because they need to be in contact to be affected by the electric force.

If one of the balloons becomes positively charged, the electric force increases.

The packing peanuts are removed from the comb and placed on the table. Then the positively charged wool cloth is held close to the packing peanuts. What will happen to the packing peanuts?

They will stick to the wool cloth.

They will be pushed away from the wool cloth.

They will not be affected by the wool cloth.

Forces and Fields

Authored by Nicky Kupke

Science

6th - 8th Grade

NGSS covered

Used 76+ times

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119 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is an object that attracts, or pulls on, materials that contain iron?

magnet

force

field

poles

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

MULTIPLE SELECT QUESTION

45 sec • 1 pt

How do magnets interact with other magnets?

opposite charges attract

opposite charges repel

like charges attract

like charges repel

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the push or pull exerted by magnets?

magnetic force

electric force

gravitational force

electromagnetic force

Tags

NGSS.MS-PS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following statements is true?

Magnets can have two north poles.

Magnets can have two south poles.

Magnets don't always have poles.

All magnets have north and south poles.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why are most materials not magnetic?

The poles are oriented in all directions.

The poles are lined up.

The poles are backwards.

The poles are upside down.

Tags

NGSS.MS-PS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are areas where like poles of the atoms point in the same direction?

gravitational domains

electric domains

magnetic domains

ferromagnetic domains

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are materials that form magnetic domains called?

domain magnets

ferromagnetic materials

domain materials

magnetic ferros

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Forces and Fields

What is an object that attracts, or pulls on, materials that contain iron?

How do magnets interact with other magnets?

What is the push or pull exerted by magnets?

Which of the following statements is true?

Why are most materials not magnetic?

What are areas where like poles of the atoms point in the same direction?

What are materials that form magnetic domains called?

Which of the following are ferromagnetic materials?

We can see magnetic domains without a microscope.

In a small iron particle made of 200 atoms, the north poles of 100 atoms are pointed right and the north poles of another 100 atoms are pointed left. Which statement describes the net magnetic force exerted by the iron particle?

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