Question

Watch the video below to help you answer the following questions.
Magnets and Magnetic Fields

A student is investigating magnetic fields. The picture shows what happens when the student drops iron filings on a bar magnet. The student claims that the magnetic fields are not the same across the magnet. Using the picture, what evidence best supports the claim?
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1 point
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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.
As the distance between an object and a magnet increases, what happens to the force of the magnetism?
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1 point
it decreases
it increases
it stays the same
it becomes stronger
The image shows a large bar magnet with the poles labeled. How would the poles of the magnet change if it were divided into four equal parts?
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1 point
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A

B

C

D
A student is investigating with magnets. She places one end of a bar magnet near the end of another bar magnet. The diagram shows her investigation. The student claims that the two magnets have a magnetic field that exists between them. What will occur that will support the student's claim?
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The magnets will repel each other as the closest poles have opposite charges.
The magnets will repel each other as the closest poles have like 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.
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Answer 1

1) The magnetic fields of the magnet are strongest at both poles.
- (Iron filings cluster most densely at the ends, showing stronger field there.)

2) It decreases.
- (Magnetic force weakens as distance from the magnet increases.)

3) If divided into four equal parts, each piece would become a smaller bar magnet with its own north and south poles.
- (Every segment will have both a north and a south pole.)

4) The magnets will be attracted to each other as the closest poles have opposite charges.