How does increasing the amount of charge on an object affect the electric force it exerts on another charged object?

The electric force increases because the amount of charge has a direct relationship to the force.

The electric force increases because the amount of charge has an indirect relationship to the force.

The electric force decreases because the amount of charge has an indirect relationship to the force.

The electric force decreases because the amount of charge has a direct relationship to the force.

Tisa makes a diagram to organize her notes about charging objects. Which statement should she place in the region marked X?

Electrons move between objects.

The objects develop opposite charges.

The objects have the same charge.

Which best describes Earth’s magnetic field lines?

The field lines go out of Earth near Antarctica, enter Earth in northern Canada, and are not aligned with the geographic poles.

The field lines go out of Earth near Antarctica, enter Earth in northern Canada, and are aligned with the geographic poles.

The field lines go out of Earth in northern Canada, enter Earth near Antarctica, and are aligned with the geographic poles.

The field lines go out of Earth in northern Canada, enter Earth near Antarctica, and are not aligned with the geographic poles.

Jolie builds a model of a maglev train. She uses disc magnets to levitate the train. A disc magnet has its north and south poles on its faces, as shown. What is the best way to arrange the magnets on the train and on the track so that the model train levitates?

flat, so that the north pole of the magnets on the train point up and the north poles of the magnets on the track point down

flat, so that the north pole of each magnet on the train points up and the north pole of each magnet on the track points up

on edge, so that the north poles of the magnets on the train point to the front and the north poles of the magnets on the track point toward the rear

on edge, so that the north pole of each magnet on the train and on the track point toward the rear of the train

A bar magnet and a second object are hung from metal rods. The diagram below shows what happens when both objects are released. Which best describes the object on the right?

a bar magnet with its south pole on the left

a bar magnet with its north pole on the left

A compass taken to Earth’s moon does not point in a specific direction on the moon. What is the most likely reason for the difference between how the compass works on Earth and on the moon?

The moon does not have a liquid core.

The moon contains no rocks that have iron.

The moon has no bodies of water.

Which statements about Earth’s core help explain Earth’s magnetic field? Check all that apply.

The outer core is liquid and moving.

Earth’s core is composed of iron and nickel.

The inner core is liquid and moving.

How are the magnetic field lines near the south pole of a magnet affected when a second south pole is brought near it?

The field lines bend away from the second south pole.

The field lines combine with the lines around the second south pole.

The field lines overlap with the lines from the second south pole.

The field lines bend toward the second south pole.

What is the Compact Muon Solenoid used to study?

the particles emitted when atoms collide

materials that give off harmful radiation

the current produced by different types of magnets

different materials that conduct current

How does adding an iron bar to a solenoid affect the magnetic field of the electromagnet?

It increases the magnetic field’s strength.

It changes the magnetic field to a current.

It changes the magnetic field’s direction.

It decreases the magnetic field’s strength.

What affects the direction of the current moving through a wire? Check all that apply.

the direction of the magnetic field

the direction the wire moves in

the direction of the needle on an ammeter

A compass needle normally points toward Earth’s magnetic pole, which is near the North Pole. Which best explains why the needle moves away from the pole when it comes close to a current-carrying wire?

Magnetism surrounding the wire draws the needle toward the wire.

Current within the wire weakens the magnetic force of the pole.

Magnetism surrounding the wire weakens the magnetic force of the pole.

Current within the wire draws the needle toward the wire.

The diagram shows a setup for inducing a current in a wire. Which change would cause the needle on the ammeter to point to the left of the zero?

moving the wire downward through the magnetic field

disconnecting the wire from one end of the ammeter

Juan makes an adjustment to an electromagnet that causes the electromagnet to lose some of its strength. What did Juan most likely do?

He reduced the number of loops in the wire.

He increased the number of loops in the wire.

He reduced the length of the wire.

He increased the length of the wire.

Horatio drew a diagram to illustrate how magnetism is produced by electric currents. Which best explains Horatio’s error?

The magnetic field does not continually spread outward from the wire.

Magnetism is not produced by electric currents unless the wire is coiled.

The magnetic field is produced inside the wire, not outside of it.

Magnetism is only produced when a metal bar is placed near the wire.

Oran uses a ball, a bar magnet, and a compass to create a model of Earth’s magnetic field. How could he best use these materials?

He could place the bar magnet in the ball so that the south pole of the magnet is at the top of the ball and the compass needle points to it.

He could glue the compass to the ball so the needle points to the top of the ball, and move the bar magnet to show how the compass direction changes.

He could glue the compass to the ball so the needle points to the bottom of the ball, and move the bar magnet to show how the compass direction changes.

He could place the bar magnet in the ball so that the north pole of the magnet is at the top of the ball and the compass needle points to it.

The north pole of a bar magnet is moved close to the north pole of a second bar magnet. What prediction best describes how the first magnet responds when it is released?

It will move away from the second magnet because like poles repel.

It will move toward the second magnet because like poles repel.

It will move toward the second magnet because like poles attract.

It will move away from the second magnet because like poles attract.

Parker wound a wire around a large iron nail. He then created an electromagnet by connecting the ends of the wire to different batteries. The table shows the current he measured for each electromagnet. Which conclusion is best supported by the data?

Electromagnet Y is the strongest.

Electromagnet W is the strongest.

Electromagnet X is weaker than electromagnet Z.

Electromagnet Y is weaker than electromagnet X.

What must be true in order for magnetism to induce an electric current in a wire?

The wire must be part of a closed circuit.

There needs to be a switch in the circuit.

There cannot be a switch in the circuit.

The wire must be part of an open circuit.

Liang is working with an electrical circuit. She replaces a straight electrical wire with a coiled wire. What is Liang most likely trying to do?

increase the strength of the magnetic field when current flows through the circuit

decrease the strength of the magnetic field when current flows through the circuit

increase the current that flows through the wire when the circuit is active

decrease the current that flows through the wire when the circuit is active

Based on illustrations of magnetic field lines, where could an object be placed so it would not experience a magnetic force?

halfway between the like poles of two magnets, because the field lines bend away and do not enter this area

halfway between the opposite poles of two magnets, because the field lines are the closest together

above the middle of a bar magnet, because the magnetic field lines are only found around the sides of the magnet

above a pole of a bar magnet, because the magnetic field lines either go in or go out at the end

Two bar magnets are held close together. When they are released, they move toward one another. Which best describes the original placement of the magnets?

The magnets are placed side by side with the opposite poles of each magnet near the other.

The magnets are placed end to end with the north pole of each pointing toward the other.

The magnets are placed end to end with the south pole of each pointing toward the other.

The magnets are placed side by side with the like poles of each magnet near the other.

A positively charged object is placed to the left of a negatively charged object. Which best describes how the positively charged object will move?

to the right, in the direction of the electric field lines

to the left, in the direction of the electric field lines

up in the direction that the field lines bend away

down in the direction that the field lines bend away

Badri makes the table below to review the factors that affect the electric force between objects. Which change will correct the error in Badri’s table?

changing “Mass” to “Amount of electric charge”

changing “Direct” to “Indirect”

changing “Indirect” to “Direct”

changing “Distance” to “Amount of electric charge”

How are the electric field lines around a positive charge affected when a second positive charge is near it?

The field lines bend away from the second positive charge.

The field lines combine with the lines around the second positive charge.

The field lines overlap with the lines from the second positive charge.

The field lines bend toward the second positive charge.

science trimester 3 unit 4

Authored by Brielle Katz

Science

8th Grade

NGSS covered

Used 11+ times

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42 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The image shows the electric field lines around two charged particles.

At which position would the electric force be greatest?

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does an object become negatively charged?

It gains electrons.

It loses electrons.

It gains protons.

It loses protons.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does increasing the distance between charged objects affect the electric force between them?

The electric force increases because the distance has an indirect relationship to the force.

The electric force increases because the distance has a direct relationship to the force.

The electric force decreases because the distance has an indirect relationship to the force.

The electric force decreases because the distance has a direct relationship to the force.

Tags

NGSS.MS-PS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

For which pair of objects would adding the same amount of electrons to each object result in a decrease in the electric force?

two positively charged objects

two negatively charged objects

two objects that have no charge

two objects that have opposite charges

Tags

NGSS.MS-PS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Two balls are placed near one another and hang down, as shown below.

Which conclusion is supported by this evidence?

Neither ball has a charge.

The balls are both positively charged.

One ball is positively charged, and the other is negatively charged.

Each ball has a charge, but the type of charge is unknown.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The diagram shows two charged objects, X and Y.

Based on the field lines, what are the charges of the objects?

X: positive

Y: negative

X: negative

Y: positive

X: negative

Y: negative

X: positive

Y: positive

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which change increases the electric force between objects?

Two neutral objects are moved closer together.

Electrons are added to two negatively charged objects.

Two oppositely charged objects are moved farther apart.

The charge on two positively charged objects is reduced.

Tags

NGSS.MS-PS2-3

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science trimester 3 unit 4

The image shows the electric field lines around two charged particles.At which position would the electric force be greatest?

How does an object become negatively charged?

How does increasing the distance between charged objects affect the electric force between them?

For which pair of objects would adding the same amount of electrons to each object result in a decrease in the electric force?

Two balls are placed near one another and hang down, as shown below.Which conclusion is supported by this evidence?

The diagram shows two charged objects, X and Y.Based on the field lines, what are the charges of the objects?

Which change increases the electric force between objects?

How does increasing the amount of charge on an object affect the electric force it exerts on another charged object?

Tisa makes a diagram to organize her notes about charging objects.Which statement should she place in the region marked X?

The area around a charged object where the object can exert a force on other charged objects is an electric

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

The image shows the electric field lines around two charged particles.

At which position would the electric force be greatest?

Two balls are placed near one another and hang down, as shown below.

Which conclusion is supported by this evidence?

The diagram shows two charged objects, X and Y.

Based on the field lines, what are the charges of the objects?

Tisa makes a diagram to organize her notes about charging objects.

Which statement should she place in the region marked X?