- A magnet held above a toy car (with a paperclip) makes it roll. Why?
Answer: The magnet's magnetic force pulls the paperclip, so the car moves.
This question relates to the skill 3-PS2-3, which involves asking questions about cause and effect relationships in electric or magnetic interactions at a distance. Non-contact forces like magnetic and electric forces can act through air or space, allowing objects to interact without physically touching each other. A magnet held above a toy car with a paperclip causes the car to roll due to magnetic attraction on the paperclip. Answer A is right as it explains the magnetic force pulling without touch, inviting questions about magnetic effects at a distance. Distractors fail by suggesting sounds, wheel forces, or requiring contact, which are inaccurate or contradict non-contact interaction. Teach using a magnet and toy car setup, point out the gap, and question 'how can this happen without touching?' Experiment with different magnet strengths or distances for deeper understanding.
- Two magnets are 5 cm apart, not touching, and one slides away. What causes this?
Answer: Magnetic force can push magnets away even without touching.
This question assesses understanding of magnetic repulsion at a distance (3-PS2-3). Magnetic and electric forces can push or pull objects through space without any physical contact between them. When two magnets have their like poles (north-north or south-south) facing each other, they create repelling magnetic fields that push against each other across the 5 cm gap. The correct answer A recognizes that magnetic force can push magnets apart without touching, showing comprehension of repulsive non-contact forces. The distractors are incorrect because B attributes movement to wind, C requires physical contact and bouncing, and D invents a non-existent table force. Teaching strategies include demonstrating magnetic repulsion with bar magnets on a smooth surface, measuring how far apart magnets push each other, and asking students to predict what happens at different distances. Emphasize that the force acts through empty space between the magnets.
- A magnet held above a toy car with a paperclip makes it roll. What force acts?
Answer: Magnetic force pulls the paperclip and car even without touching.
This question tests understanding of magnetic force acting at a distance on objects (3-PS2-3). Magnetic forces can act through air and other materials without direct contact, attracting magnetic materials like the paperclip attached to the toy car. The magnet held above creates a magnetic field that extends downward, pulling the paperclip (and thus the car) without touching either object, demonstrating action at a distance. The correct answer A identifies that magnetic force pulls both the paperclip and attached car without contact, showing comprehension of how magnetic forces work through space. The distractors fail because B attributes movement to wind, C incorrectly requires the magnet to touch the car, and D reverses the cause-effect relationship. To teach this, demonstrate with magnets moving objects with paperclips attached, testing different distances and barriers. Ask students to predict and explain how far away the magnet can still move the car.
- A plastic comb rubbed on wool is 3 cm from paper bits. Why do bits jump up?
Answer: Static electricity can attract paper bits from a distance.
This question assesses recognition of electric force attraction at a distance (3-PS2-3). Static electricity creates invisible electric fields that can attract lightweight objects across space without physical contact. When the plastic comb is rubbed on wool, electrons transfer between materials, giving the comb an electric charge that creates an attractive force field extending beyond its surface to pull the paper bits upward across the 3 cm gap. The correct answer C correctly identifies that static electricity can attract paper from a distance, showing understanding of non-contact electric forces. The distractors are wrong because A attributes movement to preference/choice, B incorrectly requires touching, and D confuses weight with electric attraction. Teaching strategies include demonstrating with various charged objects and lightweight materials, measuring attraction distances, and asking students "How does the comb lift paper without touching?" Emphasize the invisible electric field concept.
- A rubbed balloon is 1 cm from a wall, not touching, and sticks. What causes it?
Answer: Static electricity makes a force that can attract from a distance.
This question aligns with the skill 3-PS2-3, which involves asking questions to determine cause and effect relationships of electric or magnetic interactions between objects not in contact. Non-contact forces, such as magnetic and electric forces, can act through air or space, allowing objects to interact without physically touching each other. A rubbed balloon 1 cm from a wall sticks due to static electricity creating an attractive force across the distance. Answer B correctly explains static electricity as the force attracting from a distance, linking cause and effect. Distractors fail as A suggests glue, C requires holding, and D misuses gravity, ignoring electrostatics. Demonstrate with balloons and walls, pointing out the space, and ask 'How can it stick without touching?' Vary distances to show attraction limits.
- A balloon rubbed on hair sticks to a wall with a small gap. How?
Answer: Static electricity makes the balloon attract the wall without touching.
This question relates to the skill 3-PS2-3, which involves asking questions about cause and effect relationships in electric or magnetic interactions at a distance. Non-contact forces like magnetic and electric forces can act through air or space, allowing objects to interact without physically touching each other. In this case, a balloon rubbed on hair sticks to a wall with a small gap due to static electric attraction. Answer B is correct as it identifies static electricity enabling attraction without contact, fostering questions about electric forces at a distance. Distractors fail by suggesting glue, magnets, or physical holding, which overlook the non-contact electric interaction or introduce wrong forces. Teach by rubbing balloons on hair and observing wall sticking, emphasizing the gap, and asking 'how can this happen without touching?' Test with different materials to explore static electricity variations.
- A plastic comb rubbed on wool lifts paper bits from 3 cm away. What force?
Answer: Static electricity pulls the paper bits toward the comb from a distance.
This question relates to the skill 3-PS2-3, which involves asking questions about cause and effect relationships in electric or magnetic interactions at a distance. Non-contact forces like magnetic and electric forces can act through air or space, allowing objects to interact without physically touching each other. The plastic comb, charged by rubbing on wool, lifts paper bits from 3 cm away via static electric attraction. Choice B correctly identifies static electricity pulling the paper from a distance, promoting questions on cause-effect in electric interactions. Distractors err by claiming magnetic force, requiring touch, or citing weight changes, which misidentify the force or ignore non-contact nature. Demonstrate with a comb and paper bits, stress the distance, and ask 'how can this happen without touching?' Vary distances to investigate how closeness affects the electric pull.
- A magnet is held 2 cm above paperclips; they jump up without touching. Why?
Answer: The magnet's magnetic force pulls the paperclips through the air.
This question relates to the skill 3-PS2-3, which involves asking questions about cause and effect relationships in electric or magnetic interactions at a distance. Non-contact forces like magnetic and electric forces can act through air or space, allowing objects to interact without physically touching each other. In this scenario, a magnet held 2 cm above paperclips causes them to jump up without any contact, demonstrating magnetic attraction. The correct answer, A, works because it accurately identifies the magnetic force pulling the paperclips through the air, recognizing the distance interaction and prompting questions about how forces act without touch. The distractors fail as they either require touching, attribute the movement to gravity incorrectly, or suggest non-scientific reasons like the paperclips being alive. To teach this, demonstrate with a magnet and paperclips, emphasizing the gap between them, and ask students 'how can this happen without touching?' Finally, test the attraction at different distances to observe how the force changes.
- Two balloons rubbed on hair are held close, not touching, and push apart. Why?
Answer: Static electricity can make objects push away from a distance.
This question tests understanding of electric force repulsion at a distance (3-PS2-3). Electric forces can both attract and repel objects through space without contact, depending on the charges involved. When both balloons are rubbed on hair, they gain the same type of electric charge (typically negative from gaining electrons), and like charges repel each other across the gap between the balloons, pushing them apart. The correct answer C identifies that static electricity can make objects push away from a distance, showing understanding of repulsive electric forces. The distractors fail because A invents a non-existent "hard air" explanation, B incorrectly requires touching and bouncing, and D wrongly attributes the repulsion to magnetic force instead of electric force. To teach this concept, charge multiple balloons the same way and show repulsion, compare with attraction to neutral objects, and ask students "Why do similarly charged balloons push apart without touching?"
- Two bar magnets are 5 cm apart, not touching. One slides away. Why?
Answer: Magnetic force can push magnets apart from a distance.
This question aligns with the skill 3-PS2-3, which involves asking questions to determine cause and effect relationships of electric or magnetic interactions between objects not in contact. Non-contact forces, such as magnetic and electric forces, can act through air or space, allowing objects to interact without physically touching each other. Here, two bar magnets 5 cm apart experience repulsion, causing one to slide away due to opposing magnetic poles interacting at a distance. The correct answer, C, correctly explains that magnetic force can push magnets apart from a distance, highlighting the cause-effect relationship without contact. Distractors like A personify the magnets, B insists on touching which contradicts the non-contact force, and D attributes it to external factors like table shaking. For teaching, demonstrate with bar magnets on a smooth surface, emphasizing the space between them, and ask 'How can this happen without touching?' Try varying distances to show how repulsion strength decreases with greater separation.
- Two magnets are 5 cm apart, not touching. Which force makes one move away?
Answer: Magnetic force can repel, pushing a magnet away without touching.
This question tests understanding of magnetic repulsion as a force at a distance (3-PS2-3). Magnetic forces include both attraction and repulsion, and these forces act through space without requiring physical contact between objects. When two magnets are positioned with like poles facing each other (north-north or south-south), they create repelling magnetic fields that push against each other across the 5 cm gap, causing one magnet to move away from the other. The correct answer B correctly identifies that magnetic force can repel and push magnets apart without touching, demonstrating understanding of repulsive magnetic forces at a distance. The distractors are wrong because A denies any force exists, C incorrectly attributes movement to weight rather than magnetic repulsion, and D confuses magnetic force with sound. To teach this, demonstrate magnetic repulsion with floating magnets or magnets on wheels, measure repulsion distances, and ask "What invisible force pushes the magnets apart?"
- A magnet is held 2 cm above paperclips, not touching. Why do paperclips jump up?
Answer: Magnetic force pulls the paperclips toward the magnet through the air.
This question aligns with the skill 3-PS2-3, which involves asking questions to determine cause and effect relationships of electric or magnetic interactions between objects not in contact. Non-contact forces, such as magnetic and electric forces, can act through air or space, allowing objects to interact without physically touching each other. In this scenario, a magnet held 2 cm above paperclips causes them to jump up due to magnetic attraction acting at a distance. The correct answer, B, accurately identifies the magnetic force pulling the paperclips toward the magnet through the air, recognizing the non-contact nature of the interaction. The distractors fail because A anthropomorphizes the paperclips, C incorrectly requires touching, and D misattributes the force to gravity instead of magnetism. To teach this, demonstrate by holding a magnet above paperclips and emphasizing the gap, asking students 'How can the paperclips move without the magnet touching them?' Additionally, test with different distances to observe how the strength of the magnetic force changes.
- A magnet is held near a compass, not touching, and the needle turns. Why?
Answer: Magnetic force from the magnet can move the needle from a distance.
This question assesses understanding of magnetic interactions between objects at a distance (3-PS2-3). Magnetic forces act through space without physical contact, and a compass needle is itself a small magnet that responds to external magnetic fields. When the magnet is held near the compass, its magnetic field interacts with the compass needle's magnetic field, causing the needle to turn and align with the stronger external field without any touching. The correct answer B properly identifies that magnetic force from the magnet moves the needle from a distance, demonstrating understanding of magnetic field interactions. The distractors are incorrect because A anthropomorphizes the needle as hearing, C wrongly requires physical contact, and D confuses magnetic force with static electricity. Teaching strategies include demonstrating compass deflection at various distances from magnets, mapping magnetic fields with multiple compasses, and asking "Why does the needle move before the magnet touches the compass?"
- Two magnets are 5 cm apart, not touching, and one slides away. What causes this?
Answer: They move away only after they touch and bounce.
This question assesses understanding of magnetic repulsion at a distance (3-PS2-3). Magnetic and electric forces can push or pull objects through space without any physical contact between them. When two magnets have their like poles (north-north or south-south) facing each other, they create repelling magnetic fields that push against each other across the 5 cm gap. The correct answer A recognizes that magnetic force can push magnets apart without touching, showing comprehension of repulsive non-contact forces. The distractors are incorrect because B attributes movement to wind, C requires physical contact and bouncing, and D invents a non-existent table force. Teaching strategies include demonstrating magnetic repulsion with bar magnets on a smooth surface, measuring how far apart magnets push each other, and asking students to predict what happens at different distances. Emphasize that the force acts through empty space between the magnets.
- A magnet held near a compass (not touching) makes the needle turn. How?
Answer: The magnet's magnetic force affects the needle even through air.
This question relates to the skill 3-PS2-3, which involves asking questions about cause and effect relationships in electric or magnetic interactions at a distance. Non-contact forces like magnetic and electric forces can act through air or space, allowing objects to interact without physically touching each other. A magnet near a compass turns the needle without touching, due to the magnetic field influencing the needle. Choice A correctly states the magnetic force acts through air, encouraging cause-effect questions on distant interactions. Distractors are wrong as they require touching, suggest color preferences, or misattribute to static electricity, ignoring the magnetic nature. Demonstrate with a compass and magnet, emphasize no contact, and ask 'how can this happen without touching?' Test at various distances to observe field strength effects.
- A rubbed balloon is 1 cm from a wall, not touching, and moves toward it. What causes it?
Answer: Static electricity can pull the balloon toward the wall from a distance.
This question assesses understanding of electric force attraction at a distance (3-PS2-3). Static electric forces can attract objects across space without any physical contact, creating observable motion before objects touch. When the balloon is rubbed and gains electric charge, it creates an electric field that extends beyond its surface, attracting the neutral or oppositely charged wall across the 1 cm gap and causing the balloon to move toward it. The correct answer A properly identifies that static electricity pulls the balloon toward the wall from a distance, showing comprehension of electric forces acting through space. The distractors fail because B anthropomorphizes the wall as "calling," C incorrectly requires someone to hold the balloon against the wall, and D wrongly identifies the force as magnetic rather than electric. Teaching strategies include demonstrating balloon attraction to various surfaces before contact, testing different gap distances, and asking students to explain "What pulls the balloon before it touches?"
- A rubbed balloon is 1 cm from a wall, not touching, and moves toward it. What causes it?
Answer: Static electricity can pull the balloon toward the wall from a distance.
This question assesses understanding of electric force attraction at a distance (3-PS2-3). Static electric forces can attract objects across space without any physical contact, creating observable motion before objects touch. When the balloon is rubbed and gains electric charge, it creates an electric field that extends beyond its surface, attracting the neutral or oppositely charged wall across the 1 cm gap and causing the balloon to move toward it. The correct answer A properly identifies that static electricity pulls the balloon toward the wall from a distance, showing comprehension of electric forces acting through space. The distractors fail because B anthropomorphizes the wall as "calling," C incorrectly requires someone to hold the balloon against the wall, and D wrongly identifies the force as magnetic rather than electric. Teaching strategies include demonstrating balloon attraction to various surfaces before contact, testing different gap distances, and asking students to explain "What pulls the balloon before it touches?"
- A balloon rubbed on hair is held near a wall, not touching, and sticks. How?
Answer: Static electricity pulls the balloon toward the wall without touching.
This question tests understanding of electric force interactions at a distance (3-PS2-3). Electric forces, like magnetic forces, can act through air without objects touching each other. When the balloon is rubbed on hair, it gains static electric charge through friction, creating an electric field around it that can attract neutral or oppositely charged objects like the wall. The correct answer A properly identifies that static electricity pulls the balloon toward the wall without contact, demonstrating understanding of electric forces at a distance. The distractors fail because B incorrectly attributes sticking to physical stickiness like glue, C wrongly requires pressing/touching, and D confuses electric attraction with magnetism. To teach this concept, demonstrate static electricity with balloons and various surfaces, showing attraction across gaps. Have students test different materials and distances, asking "Why does the balloon move toward the wall before touching it?"
- A plastic comb rubbed on wool is 3 cm from paper bits. Why do bits jump up?
Answer: Static electricity can attract paper bits from a distance.
This question assesses recognition of electric force attraction at a distance (3-PS2-3). Static electricity creates invisible electric fields that can attract lightweight objects across space without physical contact. When the plastic comb is rubbed on wool, electrons transfer between materials, giving the comb an electric charge that creates an attractive force field extending beyond its surface to pull the paper bits upward across the 3 cm gap. The correct answer C correctly identifies that static electricity can attract paper from a distance, showing understanding of non-contact electric forces. The distractors are wrong because A attributes movement to preference/choice, B incorrectly requires touching, and D confuses weight with electric attraction. Teaching strategies include demonstrating with various charged objects and lightweight materials, measuring attraction distances, and asking students "How does the comb lift paper without touching?" Emphasize the invisible electric field concept.
- A comb is 3 cm from paper bits; they jump up. Which question helps explain it?
Answer: Does the paper move more when the comb is closer but not touching?
This question relates to the skill 3-PS2-3, which involves asking questions about cause and effect relationships in electric or magnetic interactions at a distance. Non-contact forces like magnetic and electric forces can act through air or space, allowing objects to interact without physically touching each other. A comb 3 cm from paper bits causes them to jump up due to static electric attraction. Answer A is a good scientific question about distance effects without touching, directly aligning with investigating cause-effect in electric interactions. Distractors fail as they are non-scientific, like asking about color, word length, or playful motives, which don't address forces or distance. Teach by performing the comb experiment, emphasize the space, and encourage questions like 'how can this happen without touching?' Have students test closeness variations to formulate their own investigative questions.
