Magnetic Fields Critical Juncture Assessment
Authored by Jeremy Pollin
Science
8th Grade
NGSS covered
Used 734+ times
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About
This quiz focuses on magnetic fields and magnetic potential energy, targeting fundamental physics concepts appropriate for 8th grade middle school students. The questions assess students' understanding of magnetic forces between objects, the relationship between magnetic field strength and distance, and how potential energy changes when magnetic objects move within a field. Students need to grasp that magnetic forces can act at a distance without direct contact, understand that magnetic potential energy increases when objects move against magnetic forces and decreases when they move with the forces, and recognize that magnetic field strength varies with distance from the source. The assessment requires students to analyze scenarios involving magnetic attraction and repulsion, predict the motion of magnetic objects, and apply energy concepts to magnetic systems. Students must also understand that potential energy changes depend on both the direction of movement relative to the magnetic force and the strength of the magnetic field at different positions. Created by Jeremy Pollin, a Science teacher in the US who teaches grade 8. This assessment serves as an excellent tool for evaluating student mastery of magnetic field concepts through authentic, hands-on scenarios that middle schoolers can easily visualize and understand. Teachers can deploy this quiz as a formative assessment after instruction on magnetism and energy to identify misconceptions and gauge student comprehension before moving to more advanced topics. The variety of contexts—from toy trains to roller coasters—keeps students engaged while consistently reinforcing the same core principles. This resource works effectively as a homework assignment to reinforce classroom learning, a review activity before summative assessments, or a warm-up exercise to activate prior knowledge before extending into electromagnetic concepts. The quiz aligns with NGSS standards 5-PS1-3 and MS-PS3-2, which address the relationship between magnetic forces and energy transfer in physical systems.
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Student View
14 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Dylan puts two magnetic toy trains very close to each other on a track. What will happen next, and why?
The trains will not move because the magnets are not touching.
The trains will move closer to each other because the magnetic force will pull the trains together.
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.
Tags
NGSS.MS-PS2-3
NGSS.MS-PS2-5
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Dakota moves a magnetic toy train toward a magnet that cannot move. What happens to the potential energy in the system of magnets during the movement?
The potential energy increases because the train moves against the magnetic force.
The potential energy decreases because the train moves against the magnetic force.
The potential energy decreases because the train moves in the same direction as the magnetic force.
The potential energy does not change because the magnets in the system do not change.
Tags
NGSS.MS-PS3-2
NGSS.MS-PS2-2
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Pablo sets identical magnetic carts on two tracks. At the end of each track is a large magnet that cannot move. Pablo can move the carts one space to the left or one space to the right. Which movement will increase the potential energy in the system the most?
Moving the cart on Track 1 one space to the right
Moving the cart on Track 1 one space to the left
Moving the cart on Track 2 one space to the left
All these movements will result in the same change in potential energy because they each move a cart the same distance.
Tags
NGSS.MS-PS3-2
NGSS.MS-PS2-2
NGSS.MS-PS2-1
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Francisco is holding two magnets close to each other. What will happen when he lets go?
The magnets will move away from each other because the magnetic force will push the magnets apart.
The magnets will move closer to each other because the magnetic force will pull the magnets together.
The magnets will not move because the magnets are not touching.
The magnets will move away from each other because the magnets are not touching.
Tags
NGSS.MS-PS2-3
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
In a computer simulation, Noni moves a magnet (Magnet 1) away from another magnet (Magnet 2) that cannot move. Which statement accurately describes the change in potential energy?
The potential energy does not change because the magnets in the system do not change.
The potential energy decreases because Magnet 1 moves in the same direction as the magnetic force.
The potential energy decreases because Magnet 1 moves against the magnetic force.
The potential energy increases because Magnet 1 moves against the magnetic force.
Tags
NGSS.MS-PS3-2
NGSS.MS-PS2-3
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
An engineer is investigating potential energy with two identical magnetic roller coaster cars on different sides of a center magnet that cannot move. For the experiment, the engineer will move one car one space. Which movement will result in the largest increase in potential energy?
Moving Car 2 one space toward the center magnet.
Moving Car 1 one space away from the center magnet.
Moving Car 1 car one space toward the center magnet.
All these movements will result in the same change in potential energy because they each move a car the same distance.
Tags
NGSS.MS-PS3-2
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Cecilia puts two magnetic toy trains very close to each other on a track. What will happen next, and why?
The trains will not move because the magnets are not touching.
The trains will move closer to each other because the magnetic force will pull the trains together.
The trains will move away from each other because the magnets are not touching.
The trains will move away from each other because the magnetic force will push the trains apart.
Tags
NGSS.MS-PS2-3
NGSS.MS-PS2-5
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