Noncontact Forces & Electromagnets Review

Cameron and Morgan each have bar magnet laying on the desk with opposite poles facing each other. They slide the magnets in opposite directions until they stop feeling their magnet pull towards the other magnet. What can they conclude about the distance between the magnets when they stop feeling their magnets pull?

• The magnetic force weakens until they are are outside the magnetic field of their magnets.

• The distance made the magnets' force stronger.

• The magnetic fields are far enough apart to change direction.

• The magnetic field was weaker when they were close.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A student claims that Earth has a magnetic field. Which evidence would best support the student's claim?

• The student drops a ball and it falls to the ground.

• The student turns in all directions with a compass and the needle always points north.

• The student receives a shock after walking across the carpet and touching a doorknob.

• The student rolls a ball down a large hill and the ball comes to a complete stop at the bottom

If Earth had twice the mass it has now, how would the gravitational force between it and the Sun change?

• The gravitational force would be twice as much as it is now.

• The gravitational force would be four times as much as it is now.

• The gravitational force would be half as much as it is now.

• The gravitational force would be the same as it is now.

Tags

NGSS.MS-PS2-4

NGSS.MS-ESS1-2

If two charges attract to each other, then which of the following is true?

• Both charges must be positive.

• Both charges must be negative

• Both charges must be different.

• Both charges must be equal in value.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A magnet can hold a piece of paper to the door of a refrigerator. How does the magnet stick without touching the door?

• Gravity attracts the magnet to the door.

• The magnet induces a magnetic field in the paper.

• The magnetic force of the magnet can act at a distance.

• Atoms from the magnet pass through the paper and touch the door.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A student claims that the magnetic fields are not the same across the magnet. Using the picture, what evidence best supports the claim?

• The magnetic fields of the magnet are strongest at both poles.

• The magnetic fields of the magnet are strongest at the north pole.

• The magnetic fields of the magnet are strongest at the south pole.

• The magnetic fields of the magnet are strongest at the middle

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A student claims that the two magnets have a magnetic field that exists between them. What will occur that will support the student's claim?

• The magnets will repel each other as the closest poles have like charges.

• The magnets will repel each other as the closest poles have opposite charges.

• The magnets will be attracted to each other as the closest poles have like charges

• The magnets will be attracted to each other as the closest poles have opposite charges

Tags

NGSS.MS-PS2-3

A student claims that the gravitational force between two objects depends upon the mass of the objects and the distance between them. Which argument best supports the student's claim?

• If the distance between two objects increases, the gravitational force between the objects will decrease.

• If the distance between two objects decreases, the gravitational force between the objects will disappear.

• If the distance between two objects increases, the gravitational force between the objects will increase.

• If the distance between two objects decreases, the gravitational force between the objects will not change.

Tags

NGSS.MS-PS2-4

Which of the following might make the spoons repel each other?

• Neither A nor B is electrically charged.

• Both A and B are negatively charged.

• A is positively charged, and B is negatively charged

• A is negatively charged, and B is not electrically charged.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

These forces are considered Distant Noncontact Forces (check all that apply).

• Gravitational

• Electrical

• Friction

• Air resistance

• Magnetic

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

NGSS.MS-PS2-4