Magnetic Fields Unit Review

What will happen next?

• The trains will move closer because the magnetic force will pull the trains together.

• The trains will not move because the magnets are not touching.

• The trains will move away from each other because the magnetic force will push the trains apart.

• The trains will move away from each other because the magnets are not touching.

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NGSS.MS-PS2-3

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What happens to the potential energy?

• The potential energy does not change because the magnets in the system do not change.

• The potential energy increases because Magnet 2 moves against the magnetic force.

• The potential energy decreases because Magnet 2 moves against the magnetic force.

• The potential energy decreases because Magnet 2 moves in the same direction as the magnetic force.

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NGSS.MS-PS2-3

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Which move will result in the greatest potential energy increase?

• Moving the cart on Track 1 one space to the right.

• Moving the cart on Track 2 one space to the left.

• Moving the cart on Track 2 one space to the right.

• All moves will result in the same increase in potential energy.

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NGSS.MS-PS2-4

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Based on the magnetic field lines diagram, what will happen to these two sets of magnets?

• Set 1 magnets will repel, set 2 magnets will attract

• Set 1 magnets will attract, set 2 magnets will attract

• Set 1 magnets will attract, set 2 magnets will repel

• Both sets of magnets will repel

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NGSS.MS-PS2-3

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What will happen when these magnets are let go?

• The magnets will not move because they are not touching.

• The magnets will move closer to each other because the magnetic force will pull them together.

• The magnets will move away from each other because the magnets are not touching.

• The magnets will move away from each other because the magnet force will push them apart.

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

What happens to the potential energy in the system, when the magnetic train is moved away from the stationary magnet?

• The potential energy increases because the magnet is moved against the magnet force.

• The potential energy decreases because the magnet is moved against the magnet force.

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NGSS.MS-PS2-5

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Which movement will result in the greatest potential energy increase?

• Moving Car 1 one space toward the center magnet.

• Moving Car 2 one space away from the center magnet.

• Moving Car 2 one space toward the center magnet.

• All movements will result in the same change in potential energy.

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NGSS.MS-PS3-2

A spaceship is traveling through space. Suddenly, its speed increases. What can you say about the kinetic energy of the spaceship?

• The kinetic energy increases as the speed increases.

• The kinetic energy decreases as it is converted to speed.

• The kinetic energy stays the same because kinetic energy and speed are unrelated.

• There is no way to determine what happened to the kinetic energy.

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NGSS.MS-PS3-1

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What happens to the energy in a system of magnets when the magnetic force causes two magnets to move?

• The potential energy in the system increases.

• The kinetic energy in the system decreases.

• Some of the potential energy is converted to kinetic energy.

• Some of the kinetic energy changes to potential energy.

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NGSS.MS-PS3-1

NGSS.MS-PS3-2

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Julia puts two magnetic toy trains very close to each other on a track. What will happen next, and why?

• The trains will move toward each other because the magnetic force will pull the trains together.

• The trains will move apart because the magnetic force will push the trains away from each other.

• The trains will not move because the magnets are not touching.

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NGSS.3-PS2-2

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