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.

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.

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.

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.

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.

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.

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.

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.

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.

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.