Marvelous Magnets - 3rd Grade Science

The picture above shows some ring-shaped magnets on a pencil.

Kim pushed the magnets together, but they came apart as soon as she let go. Why do the magnets repel each other?

• The pencil stops the force of the magnets.

• The magnets are not strong enough to stay together.

• The same poles of the magnets are facing each other.

• The amount of air space between the magnets stops the magnetic force.

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The picture below shows magnet 2 being pushed toward magnet 1.

What will happen to the magnets as they move closer to each other?

• Nothing will happen to the magnets.

• The magnets will attract each other.

• the magnets will repel each other.

• The magnets will stack on top of each other.

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Keshia places a bar magnet next to a metal spoon. Then she places the same bar magnet next to a plastic spoon. Keshia records what happens. What question best matches the investigation?

• Why are magnets attracted to all metals?

• How do different types of materials interact with magnets?

• Does the size of a magnet affect the strength of its magnetism?

• How does the weight of a metal spoon affect their attraction to a magnet?

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Some materials are magnetic, but most are not. Which of the following is magnetic

• Iron

• plastic

• wood

• paper

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Matt has two bar magnets. When he holds the ends of the magnets together, one end of the magnet is attracted to the other end of the magnet, but not the middle of the magnet. How can Matt explain the reaction of the magnets?

• The ends of both magnets are north poles.

• The middle of the magnet is not working correctly.

• The magnetic forces of each magnet are strongest at the poles.

• The ends of both magnets were south poles.

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Dustin is doing an experiment on magnetism. He observes that a piece of paper is not pulled toward a magnet. He wonders why a magnet is able to stick to paper on a magnetic refrigerator. Which statement best explains why this can happen?

• The magnet repels paper.

• The paper contains nickel, iron, or cobalt.

• The paper has been rubbed many times with a magnet.

• The magnet is attracted to the refrigerator metal through the paper.

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Logan is looking around his house for objects that will be attracted to a magnet. Which kinds of objects should he look for?

• glass objects

• metal objects

• plastic objects

• wooden objects

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Lucy places the two magnets on a table. The North side of one magnet is facing the South side of the other magnet. What will most likely happen if Lucy pushes one magnet toward the other magnet?

• The magnets will stick together.

• The magnets will not change position.

• The magnets will flip around the other way.

• The magnets will move away from each other.

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Reggie tries to push together the magnets shown. The magnets repel each other.

Which of the following statements best explains why Reggie cannot get the two magnets to touch?

• There is no magnetic field at the ends of the magnets.

• The same ends of the magnets are facing each other.

• There is an electric force field at the ends of the magnets.

• The opposite ends of the magnets are facing each other.

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The students in Mrs. Kroll’s class use different methods to conduct investigations about magnets. Which of the following is an example of an experiment?

• taking notes on how magnets work

• making a scale model of magnetic attraction

• determining the effect of temperature on magnets

• recording the number of types of magnets there are

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