What Was the Question Being Investigated in the Learn About It Video with the Magnetic Field Sensor

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?

• 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.

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A student claims that a magnetic field can affect objects that are not in direct contact with each other. Which argument best supports the students claim?

• A ball rolls downhill and eventually comes to a stop.

• A light bulb becomes hot to the touch after being lit.

• A compass needle points to the north from any location.

• A lighting bolt releases a charge from the sky to the ground.

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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.

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Which drawing below represents the electric field surrounding two objects that have equal magnitude charges of the same polarity?

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The picture below shows paper clips, W, X, Y, and Z, placed at different distances away from a magnet. Which paper clip has the least chance of moving toward the magnet?

• paper clip W

• paper clip X

• paper clip Y

• paper clip Z

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Roger wants to use a magnet to pick up a sheet of metal, but his magnet is too far away to attract. What is a possible solution?

• Get a bigger magnet, because the magnetic field will be larger.

• Turn the magnet around and use the opposite pole instead.

• Get a smaller magnet, because the magnetic field will be smaller.

• Turn the magnet so that the middle is pointed toward the metal.

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At which point is the magnetic field the strongest?

• Point 1

• Point 2

• Point 3

• Point 4

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Which diagram represents magnetic field lines between two north magnetic poles?

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In which diagram do the field lines best represent the magnetic field around Earth?

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The diagram shows the magnetic field lines between two magnetic poles, A and B. Which statement describes the polarity of magnetic poles A and B?

• A is a north pole and B is a south pole.

• A is a south pole and B is a north pole.

• Both A and B are north poles.

• Both A and B are south poles.

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