Magnets
Quiz by Laura Valentine
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11 questions
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- Q1The attractive force between two magnets increases. Which statement explains why this would happen?The like poles of the magnets are pointed at each other and move closer together.The unlike poles of the magnets are pointed at each other and move farther apart.The unlike poles of the magnets are pointed at each other and move closer together.The like poles of the magnets are pointed at each other and move farther apart45s
- Q2Kim has two bar magnets. First, she places them beside one another, as shown in Picture A. Then, she moves one of the bar magnets so they are placed as shown in Picture B. How did the magnetic force change?The bars go from attracting each other to repelling each other.The bars go from attracting each other to the second bar rotating.The bars go from repelling each other to rotatingThe bars go from repelling each other to attracting each other.60s
- Q3Which of these determines whether or not a material is magnetic?the alignment of atoms in the materialthe weight of the material on Earththe density of the materialthe number of elements that make up the material60s
- Q4Candice claims that all magnets have two magnetic poles. Which of these observations would best support her claim?The north pole of a compass needle is attracted to the south pole of a bar magnet.The strength of the magnetic force from a bar magnet decreases as the magnet is pulled away from another object.When a bar magnet is cut in half, each half has a north pole and a south pole.Iron is attracted to a magnet but not to other pieces of iron.45s
- Q5Angela tries to pick up a copper penny using a bar magnet, but the penny does not move. Next, she tries to pick up an iron nail using the bar magnet, and the nail lifts up toward the magnet. Which of the following best describes a ferromagnetic material like iron?Ferromagnetic materials conduct electricity easily.Ferromagnetic materials have magnetic domains that align with a magnetic field.Ferromagnetic materials are nonmetals that produce magnetic forces.Ferromagnetic materials produce their own magnetic force.45s
- Q6A magician wants to use magnets to create a new illusion for her show. She plans to hide strong magnets in her shoes and inside a special rug on the stage. When she tests the illusion, she finds that her shoes stick to the rug. What will happen if she flips the poles of the magnets in each of her shoes?Her shoes will stick to each other instead of to the rug.Her shoes will float above the rug.Her shoes will still be stuck to the rug.Her shoes will no longer be affected by the rug.45s
- Q7Why can some objects be magnetized by rubbing one pole of an existing magnet in one direction along the object?The motion of the existing magnet against the object scrambles, or unaligns, the magnetic domains of the object.The motion of the existing magnet against the object wears away the object’s surface, exposing the naturally occurring magnets underneath.The motion of the existing magnet against the object aligns the magnetic domains of the object.The motion of the existing magnet against the object generates an electric current that transforms the object into an electromagnet.45s
- Q8A student finds three unmarked bar magnets in a lab. She wants to know how strong each of the magnets is. She also has a set of paper clips. Explain how she could use the paper clips to determine the strength of each magnet.Put the magnet on the paperclipPut the paperclips togetherMeasure the amount of distance needed to pull the paper clipsTime how long it takes the paperclips to stick together45s
- Q9Ajit has a bar magnet, a copper rod, an iron rod, and a steel rod. First, he moves the magnet toward the middle of the copper rod. Next, he moves the magnet toward the middle of the iron rod. Finally, he moves the magnet toward the middle of the steel rod. In each step of his investigation, he writes down his observations. What is he trying to discover?What is metal?What materials are magnetic?Why magnets like metal?How strong magnets are?45s
- Q10What would this look like if it became magnetized?Nothing would changeThe arrows would go awayAll the arrows would face the same directionThe arrows would alternate directions, but have a pattern60s
- Q11Why is this material not magnetic?The atoms are too far awayThe forces cancel outThe poles are repellingThere are no magnets60s
