Elementary School Science Quiz: How Magnets Solve Problems
20 questions · exam conditions
0:00
How Magnets Solve ProblemsQuestion 1 of 20

Two piles of cans must be made quickly. How does the magnetic property of attraction solve it?​​

A magnet pulls only the steel cans, so the aluminum cans stay behind.
A magnet pulls the aluminum cans, so the steel cans stay behind.
A magnet works like scissors, so it cuts the cans into two piles.
A magnet heats the cans, so they roll into separate piles by themselves.
← Back to quizzes

Elementary School Science Quiz

Elementary School Science Quiz: How Magnets Solve Problems

Practice How Magnets Solve Problems in Elementary School Science with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on How Magnets Solve Problems, giving you a quick way to practice the rules, question types, and explanations that matter most for Elementary School Science.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

Two piles of cans must be made quickly. How does the magnetic property of attraction solve it?​​

  1. A magnet pulls only the steel cans, so the aluminum cans stay behind. (correct answer)
  2. A magnet pulls the aluminum cans, so the steel cans stay behind.
  3. A magnet works like scissors, so it cuts the cans into two piles.
  4. A magnet heats the cans, so they roll into separate piles by themselves.
Explanation: This question tests understanding of how magnets solve problems (3-PS2-4). Key magnetic properties include attracting steel/iron, working through materials, working at a distance, different strengths, and only working on certain metals. The problem is quickly separating mixed cans into two piles, and the magnetic solution uses selective attraction where magnets pull only steel cans while aluminum cans remain. Answer A correctly identifies that magnets pull only steel cans, leaving aluminum cans behind, creating two separate piles efficiently through selective magnetic attraction. The distractors fail because B reverses the metals (magnets don't attract aluminum), C compares magnets to scissors (wrong mechanism), and D suggests magnets heat objects to sort them (not how magnetic sorting works). To teach this concept, mix steel and aluminum objects, use a strong magnet to pull steel items away, and ask "why does the magnet create two piles automatically?"

Question 2

Mixed cans need sorting. Why does using magnets solve this problem?

  1. Magnets attract aluminum best, so only aluminum sticks and gets separated.
  2. Magnets attract steel cans, so steel sticks while aluminum does not and stays behind. (correct answer)
  3. Magnets paint the cans different colors, so sorting is easy.
  4. Magnets cut the cans in half, so you can tell which ones are steel.
Explanation: This question aligns with the skill 3-PS2-4: Explain how magnetic properties solve problems. Key magnetic properties include attracting steel or iron objects, working through certain materials, acting at a distance, having varying strengths, and only affecting specific metals. The problem requires sorting mixed steel and aluminum cans, and the magnetic solution uses selective attraction to separate steel that sticks while aluminum remains. The correct answer works because it identifies attraction to steel but not aluminum, correctly explaining how this enables sorting and demonstrates cause-effect by showing separation through magnetic pull. Distractors fail because they reverse the attraction to aluminum, involve cutting or painting, which are non-magnetic actions and incorrect. To teach this, first identify the problem's need for material differentiation, then match it to the magnetic property of selective attraction. Finally, test the solution with mixed cans and a magnet to confirm sorting, and ask 'which magnetic property is being used here?' to encourage reflection.

Question 3

Paperclips fell under a radiator where hands can't fit. Which magnetic property helps?​

  1. Magnets make paperclips disappear, so you do not need to pick them up.
  2. Magnets can stretch like rubber, so they reach under the radiator.
  3. Magnets attract glass best, so they pull paperclips because paperclips are glass.
  4. Magnetic force can pull steel from a small distance, even without touching. (correct answer)
Explanation: This question tests understanding of how magnetic properties solve problems (3-PS2-4). Key magnetic properties include: magnets attract steel/iron, work through materials, work at distance, have different strengths, and only work on certain metals. The problem is retrieving paperclips from under a radiator where hands can't fit, and the magnetic solution uses the property that magnets work at a distance without touching. Answer A correctly identifies that magnetic force can pull steel from a small distance even without touching, allowing retrieval from tight spaces. Answer B incorrectly describes magnets stretching; C invents disappearance; D falsely claims paperclips are glass and magnets attract glass. To teach this concept, create obstacles that prevent direct access to metal objects, use magnets to retrieve them from a distance, and have students explain how the "action at a distance" property solves the access problem.

Question 4

You want a toy car to move without touching it. What magnetic idea makes this work?​

  1. Magnets can attract metal from a short distance, so the car follows the magnet. (correct answer)
  2. Magnets only work when they touch, so you must push the car with the magnet.
  3. Magnets make wheels disappear, so the car slides without rolling.
  4. Magnets turn the table into a ramp, so the car rolls by gravity.
Explanation: This question tests understanding of how magnetic properties solve problems (3-PS2-4). Key magnetic properties include: magnets attract steel/iron, work through materials, work at distance, have different strengths, and only work on certain metals. The problem is moving a toy car without physical contact, and the magnetic solution uses the property that magnets work at a distance. Answer A correctly explains that magnets can attract metal from a short distance, allowing the car (with metal parts) to follow the magnet without touching. Answer B incorrectly claims magnets only work on contact; C invents wheel disappearance; D creates an unrelated ramp transformation. When teaching, demonstrate magnetic attraction at various distances, measure the working distance, and have students predict and test how far away a magnet can still move metal objects.

Question 5

Paperclips fell into a narrow crack. Which magnetic property makes this solution work?

  1. Magnets attract steel, so the paperclips can be pulled out without grabbing them. (correct answer)
  2. Magnets attract glass, so the crack pulls the paperclips toward the magnet.
  3. Magnets make paperclips grow bigger, so they pop out of the crack.
  4. Magnets only work in sunlight, so the crack must be outside.
Explanation: This question assesses the skill 3-PS2-4: Explain how magnetic properties solve problems. Key magnetic properties include attracting steel or iron, working through materials, acting at a distance, having different strengths, and only affecting certain metals. The problem involves paperclips in a narrow crack requiring extraction without direct access, and the magnetic solution uses attraction to pull them out. The correct answer works because it identifies the property of attracting steel, correctly explains pulling without grabbing, and shows the cause-effect of magnetism solving the narrow space issue. Distractors fail by suggesting attraction to glass, growing bigger, or needing sunlight, which are incorrect science or vague. To teach this, first identify the problem's need for reaching tight spaces, then match the magnetic property of attraction to that need. Finally, test the solution by dropping clips in a crack and retrieving with a magnet, and ask 'which magnetic property is being used here?' to reinforce understanding.

Question 6

Steel screws fell into sawdust. How does the magnetic solution help find them?​​

  1. The magnet attracts steel screws, so they stick while sawdust does not. (correct answer)
  2. The magnet attracts wood, so the sawdust sticks and shows where screws are.
  3. The magnet paints the screws red, so you can see them better.
  4. The magnet makes the sawdust disappear, so the floor looks clean.
Explanation: This question tests understanding of how magnets solve problems (3-PS2-4). Key magnetic properties include attracting steel/iron, working through materials, working at a distance, different strengths, and only working on certain metals. The problem is finding steel screws mixed with sawdust, and the magnetic solution uses selective attraction where magnets attract steel but not wood. Answer A correctly identifies that magnets attract steel screws while sawdust (wood) is not attracted, allowing easy separation and collection of screws. The distractors fail because B incorrectly states magnets attract wood, C suggests magnets paint objects (not a magnetic property), and D claims magnets make sawdust disappear (impossible). Teaching strategies include having students predict what will happen before testing, drag a magnet through sawdust with hidden metal objects, and observe how only metal items stick while sawdust falls away.

Question 7

Steel and aluminum cans are mixed together. How does using magnets help solve the problem?​

  1. Magnets attract aluminum, so only aluminum cans stick and get separated.
  2. Magnets attract steel, so steel cans stick and can be pulled into a new pile. (correct answer)
  3. Magnets paint the cans different colors, so you can sort by color.
  4. Magnets make the cans colder, so cold cans go in one bin.
Explanation: This question tests understanding of how magnets solve problems (3-PS2-4). Key magnetic properties include attracting steel/iron, working through materials, working at a distance, having different strengths, and only working on certain metals. The problem is separating mixed steel and aluminum cans for recycling, and the magnetic solution uses selective attraction to pull only steel cans. Answer B correctly explains that magnets attract steel cans, allowing them to be pulled into a separate pile while aluminum cans remain unaffected. Answer A incorrectly claims magnets attract aluminum; C impossibly suggests magnets paint cans; D introduces irrelevant temperature change. Teaching method: Mix steel and aluminum objects, then use magnets to demonstrate selective sorting, asking students to explain why only certain cans move and connect this to the magnetic property of selective metal attraction.

Question 8

Steel screws fell into sawdust. Explain how the magnetic solution helps with this problem.

  1. A magnet makes the sawdust jump away because it is scared of magnets.
  2. A magnet attracts steel screws but not sawdust, so the screws stick and get collected. (correct answer)
  3. A magnet turns the screws into wood, so they match the sawdust and disappear.
  4. A magnet attracts sawdust, so the screws are left behind on the floor.
Explanation: This question aligns with the skill 3-PS2-4: Explain how magnetic properties solve problems. Key magnetic properties include attracting steel or iron objects, working through certain materials, acting at a distance, having varying strengths, and only affecting specific metals. The problem is collecting steel screws mixed in sawdust, which requires separating metal from non-metal debris, and the magnetic solution uses selective attraction to pick up screws while leaving sawdust behind. The correct answer works because it identifies attraction to steel but not sawdust, correctly explaining how this property collects the screws and shows cause-effect by linking the magnet's pull to separation. Distractors fail because they reverse the attraction, involve impossible transformations like turning screws into wood, or attribute emotions to sawdust, which are scientifically inaccurate. To teach this, first identify the problem's need for selective collection, then match it to the magnetic property of attracting only certain metals. Finally, test the solution with a magnet in sawdust and screws to confirm it works, and ask 'which magnetic property is being used here?' to deepen understanding.

Question 9

Paperclips fell under a radiator where hands can't fit. Which magnetic property helps?

  1. Magnetic force can pull steel from a small distance, even without touching. (correct answer)
  2. Magnets can stretch like rubber, so they reach under the radiator.
  3. Magnets make paperclips disappear, so you do not need to pick them up.
  4. Magnets attract glass best, so they pull paperclips because paperclips are glass.
Explanation: This question tests understanding of how magnetic properties solve problems (3-PS2-4). Key magnetic properties include: magnets attract steel/iron, work through materials, work at distance, have different strengths, and only work on certain metals. The problem is retrieving paperclips from under a radiator where hands can't fit, and the magnetic solution uses the property that magnets work at a distance without touching. Answer A correctly identifies that magnetic force can pull steel from a small distance even without touching, allowing retrieval from tight spaces. Answer B incorrectly describes magnets stretching; C invents disappearance; D falsely claims paperclips are glass and magnets attract glass. To teach this concept, create obstacles that prevent direct access to metal objects, use magnets to retrieve them from a distance, and have students explain how the "action at a distance" property solves the access problem.

Question 10

You need to hang a poster on a metal board. Which magnetic property makes it work?​

  1. Magnets can hold paper against metal because they attract the metal through paper. (correct answer)
  2. Magnets make holes in paper, so the poster stays up like a nail.
  3. Magnets attract metal, so they pull the metal board toward the paper.
  4. Magnets only work on wood, so they hold posters best on wooden boards.
Explanation: This question tests understanding of how magnetic properties solve problems (3-PS2-4). Key magnetic properties include: magnets attract steel/iron, work through materials, work at distance, have different strengths, and only work on certain metals. The problem is hanging a poster on a metal board, and the magnetic solution uses the property that magnets work through thin materials. Answer B correctly explains that magnets can hold paper against metal because they attract the metal through the paper - the magnet on one side attracts the metal board through the poster. Answer A reverses the concept suggesting the board moves toward paper; C incorrectly limits magnets to wood; D invents hole-making properties. To teach this concept, place paper between a magnet and metal surface, observe how the magnet still attracts through the paper, and have students test different materials to explore this "working through materials" property.

Question 11

Papers keep falling inside a metal locker. Which magnetic property makes magnet clips work?

  1. Magnets only work in the dark, so the papers stay up only at night.
  2. Magnets are the same as tape, so they glue papers forever and cannot move.
  3. Magnets attract paper, so the papers stick even without a locker.
  4. Magnets stick to metal, so the clip stays on the locker and holds papers up. (correct answer)
Explanation: This question aligns with the skill 3-PS2-4: Explain how magnetic properties solve problems. Key magnetic properties include attracting steel or iron objects, working through certain materials, acting at a distance, having varying strengths, and only affecting specific metals. The problem is papers falling inside a metal locker, requiring a way to hold them up without permanent attachment, and the magnetic solution uses attraction to metal to keep the clip and papers in place. The correct answer works because it identifies the property of sticking to metal, correctly explaining how this holds papers and demonstrates cause-effect by showing the magnet's attachment solving the falling issue. Distractors fail because they wrongly state magnets attract paper directly, equate to tape, or work only in the dark, which misrepresent magnetic science. To teach this, first identify the problem's need for removable holding on metal, then match it to the magnetic property of attraction to specific metals. Finally, test the solution with magnet clips in a locker to confirm papers stay up, and ask 'which magnetic property is being used here?' to enhance learning.

Question 12

Paperclips fell behind the bookshelf. How do magnets solve this problem?

  1. A magnet attracts steel paperclips from a short distance, so you can pull them out. (correct answer)
  2. A magnet melts the paperclips, so they slide out from behind the shelf.
  3. A magnet works best on plastic, so it pulls the paperclips out easily.
  4. A magnet makes the bookshelf move, so the paperclips fall into your hand.
Explanation: This question aligns with the skill 3-PS2-4: Explain how magnetic properties solve problems. Key magnetic properties include attracting steel or iron objects, working through certain materials, acting at a distance, having varying strengths, and only affecting specific metals. The problem involves retrieving paperclips that fell behind a bookshelf, which requires collecting metal objects from an inaccessible spot, and the magnetic solution uses attraction at a distance to pull them out without moving the shelf. The correct answer works because it identifies the property of attraction to steel at a short distance, correctly explaining how this property enables retrieval and demonstrates cause-effect by showing the magnet pulling the clips. Distractors fail because they involve incorrect science like melting paperclips, working best on plastic, or moving the bookshelf, which do not relate to actual magnetic properties. To teach this, first identify the problem's need for reaching inaccessible metal objects, then match it to the magnetic property of distant attraction. Finally, test the solution by trying it with a magnet and paperclips to confirm it solves the problem, and ask 'which magnetic property is being used here?' to reinforce understanding.

Question 13

Steel and aluminum cans are mixed. Which magnetic property makes sorting work?​​

  1. Magnets attract all objects, so every can sticks to the magnet.
  2. Magnets attract steel but not aluminum, so only steel cans stick. (correct answer)
  3. Magnets melt aluminum, so the aluminum cans disappear.
  4. Magnets blow air to push the steel cans into a new pile.
Explanation: This question tests understanding of how magnets solve problems (3-PS2-4). Key magnetic properties include attracting steel/iron, working through materials, working at a distance, different strengths, and only working on certain metals. The problem requires sorting mixed steel and aluminum cans, and the magnetic solution uses the selective attraction property where magnets attract steel but not aluminum. Answer B correctly explains that magnets attract steel but not aluminum, allowing separation by pulling only steel cans to the magnet while aluminum cans remain. The distractors fail because A incorrectly claims magnets attract all objects, C suggests magnets melt aluminum (impossible), and D describes magnets blowing air (not a magnetic property). Teaching strategies include having students test different metals with magnets, observe which stick and which don't, then apply this knowledge to sorting problems by asking "which materials will the magnet pick up?"

Question 14

A cabinet door keeps swinging open. How does the magnetic property of attraction help solve it?

  1. The magnet repels the door, so it stays closed by moving away.
  2. The magnet paints the door shut, so it cannot open anymore.
  3. The magnet makes the hinges disappear, so the door cannot move.
  4. The magnet attracts the metal piece and holds the door closed until you pull. (correct answer)
Explanation: This question assesses the skill 3-PS2-4: Explain how magnetic properties solve problems. Key magnetic properties include attracting steel or iron, working through materials, acting at a distance, having different strengths, and only affecting certain metals. The problem involves a cabinet door swinging open requiring secure closure, and the magnetic solution uses attraction to hold the metal piece and keep the door shut. The correct answer works because it identifies the property of attraction, correctly explains how it holds the door until pulled, and shows the cause-effect of magnetic force solving the swinging issue. Distractors fail by suggesting painting, repelling, or removing hinges, which are non-magnetic or reverse cause-effect. To teach this, first identify the problem's need for temporary holding, then match the magnetic property of attraction to that need. Finally, test the solution by installing a magnetic latch, and ask 'which magnetic property is being used here?' to reinforce understanding.

Question 15

Steel and aluminum cans are mixed. Which magnetic property makes sorting work?​

  1. Magnets attract every kind of can, so all cans stick to the magnet.
  2. Magnets attract steel but not aluminum, so steel cans stick and aluminum doesn't. (correct answer)
  3. Magnets turn aluminum into steel, so the cans become easy to sort.
  4. Magnets dry the cans, so you can tell which ones are steel.
Explanation: This question tests understanding of how magnetic properties solve problems (3-PS2-4). Key magnetic properties include: magnets attract steel/iron, work through materials, work at distance, have different strengths, and only work on certain metals. The problem requires sorting mixed steel and aluminum cans, and the magnetic solution uses the property that magnets attract steel but not aluminum. Answer B correctly identifies this selective attraction property - steel cans stick to the magnet while aluminum cans don't, enabling easy separation. Answer A incorrectly claims magnets attract all cans; C falsely states magnets transform materials; D invents an unrelated drying property. To teach this concept, have students test different metals with magnets, identify which ones are attracted (steel/iron) and which aren't (aluminum), then apply this knowledge to solve sorting problems by asking "which magnetic property separates these materials?"

Question 16

You need to hang a poster on a metal board. Which magnetic property makes it work?

  1. Magnets attract metal, so they pull the metal board toward the paper.
  2. Magnets only work on wood, so they hold posters best on wooden boards.
  3. Magnets make holes in paper, so the poster stays up like a nail.
  4. Magnets can hold paper against metal because they attract the metal through paper. (correct answer)
Explanation: This question tests understanding of how magnetic properties solve problems (3-PS2-4). Key magnetic properties include: magnets attract steel/iron, work through materials, work at distance, have different strengths, and only work on certain metals. The problem is hanging a poster on a metal board, and the magnetic solution uses the property that magnets work through thin materials. Answer B correctly explains that magnets can hold paper against metal because they attract the metal through the paper - the magnet on one side attracts the metal board through the poster. Answer A reverses the concept suggesting the board moves toward paper; C incorrectly limits magnets to wood; D invents hole-making properties. To teach this concept, place paper between a magnet and metal surface, observe how the magnet still attracts through the paper, and have students test different materials to explore this "working through materials" property.

Question 17

A cabinet door swings open. How does the magnetic property of attraction help solve it?​

  1. A magnet dries the wood, so the hinges stop moving. (correct answer)
  2. A magnet pulls on a metal piece, helping hold the door closed.
  3. A magnet makes the door heavier, so it stays closed by weight alone.
  4. A magnet pushes the door open harder, so it cannot close anymore.
Explanation: This question tests understanding of how magnetic properties solve problems (3-PS2-4). Key magnetic properties include: magnets attract steel/iron, work through materials, work at distance, have different strengths, and only work on certain metals. The problem is keeping a cabinet door closed, and the magnetic solution uses attraction between a magnet and metal piece to create a holding force. Answer A correctly identifies that a magnet pulls on a metal piece, creating an attractive force that helps hold the door closed. Answer B incorrectly describes pushing open; C invents weight changes; D creates an unrelated wood-drying effect. To teach this concept, show magnetic cabinet latches, identify the attraction property at work, and have students design their own magnetic door-holding solutions while explaining which property they're using.

Question 18

You want posters on a metal board. Why does using magnets solve this problem?

  1. Magnets soak into the poster and glue it to the board forever. (correct answer)
  2. Magnets make the board sticky, so any paper sticks without force.
  3. Magnets only work in water, so the poster stays up when it is wet.
  4. Magnets hold paper to metal because magnetic force pulls through thin paper.
Explanation: This question tests understanding of how magnetic properties solve problems (3-PS2-4). Key magnetic properties include: magnets attract steel/iron, work through materials, work at distance, have different strengths, and only work on certain metals. The problem is hanging posters on a metal board, and the magnetic solution uses the property that magnetic force works through thin materials like paper. Answer A correctly explains that magnets hold paper to metal because the magnetic force pulls through the thin paper to attract the metal board underneath. Answer B incorrectly describes magnets soaking and gluing; C falsely limits magnets to water; D invents a sticky board property unrelated to magnetism. When teaching, demonstrate how a magnet can attract metal through paper, identify the "working through materials" property, and have students test different thicknesses to explore limits of this property.

Question 19

A cabinet door keeps swinging open. How does the magnetic property of attraction help solve the problem?

  1. A magnet attracts the metal piece and holds the door closed until you pull it open. (correct answer)
  2. A magnet repels the door, so it stays open and cannot close anymore.
  3. A magnet dries the wood, so the door shrinks and never moves again.
  4. A magnet makes the hinges disappear, so the door cannot swing.
Explanation: This question aligns with the skill 3-PS2-4: Explain how magnetic properties solve problems. Key magnetic properties include attracting steel or iron objects, working through certain materials, acting at a distance, having varying strengths, and only affecting specific metals. The problem is a cabinet door that swings open unwantedly, requiring a way to hold it closed, and the magnetic solution uses attraction to a metal piece to keep the door secured until intentionally opened. The correct answer works because it identifies the attraction property holding the door, correctly explaining how it prevents swinging and shows cause-effect by linking magnetic pull to closure. Distractors fail because they involve repulsion instead of attraction, drying wood, or making hinges disappear, which are not related to magnetic properties. To teach this, first identify the problem's need for secure holding, then match it to the magnetic property of attraction. Finally, test the solution on a model door with a magnet to confirm it stays closed, and ask 'which magnetic property is being used here?' to reinforce the concept.

Question 20

Paperclips fell into a narrow crack. Explain how the magnetic solution helps with the problem.

  1. A magnet attracts rubber, so it pulls the paperclips out with rubber bands.
  2. A magnet changes paperclips into paper, so they float out of the crack.
  3. A magnet on a stick attracts the steel paperclips, reaching where fingers cannot fit. (correct answer)
  4. A magnet makes the crack wider, so the paperclips fall out by gravity.
Explanation: This question aligns with the skill 3-PS2-4: Explain how magnetic properties solve problems. Key magnetic properties include attracting steel or iron objects, working through certain materials, acting at a distance, having varying strengths, and only affecting specific metals. The problem involves retrieving paperclips from a narrow crack where fingers cannot reach, requiring extended collection of metal objects, and the magnetic solution uses attraction on a stick to pull them out from afar. The correct answer works because it identifies attraction to steel and the ability to reach inaccessible areas, correctly explaining how this retrieves the clips and shows cause-effect by linking the magnet's pull to extraction. Distractors fail because they involve widening cracks, attracting rubber, or changing materials, which are not based on magnetic properties. To teach this, first identify the problem's need for distant retrieval, then match it to the magnetic property of attraction at a distance. Finally, test the solution with a magnet on a stick in a narrow space to confirm it works, and ask 'which magnetic property is being used here?' to build analytical skills.