Evidence of Fields - Middle School Physical Science
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Which observation best distinguishes magnetic attraction from electric attraction in a simple test?
Which observation best distinguishes magnetic attraction from electric attraction in a simple test?
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Only iron or steel objects are strongly attracted to a magnet. Magnets only attract ferromagnetic materials, unlike electric charges.
Only iron or steel objects are strongly attracted to a magnet. Magnets only attract ferromagnetic materials, unlike electric charges.
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Which option is qualitative evidence that a neutral object can be affected by an electric field?
Which option is qualitative evidence that a neutral object can be affected by an electric field?
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A charged object attracts a neutral object due to polarization. Electric fields induce charge separation in neutral objects.
A charged object attracts a neutral object due to polarization. Electric fields induce charge separation in neutral objects.
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Identify the observation that best indicates induced magnetism in an iron nail.
Identify the observation that best indicates induced magnetism in an iron nail.
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The nail becomes able to pick up paper clips after touching a magnet. Magnetic fields can magnetize ferromagnetic materials temporarily.
The nail becomes able to pick up paper clips after touching a magnet. Magnetic fields can magnetize ferromagnetic materials temporarily.
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What is the standard qualitative test to map magnetic field direction around a magnet?
What is the standard qualitative test to map magnetic field direction around a magnet?
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Use a compass to show the direction at different locations. Compasses align with local magnetic field direction.
Use a compass to show the direction at different locations. Compasses align with local magnetic field direction.
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Which option is the best qualitative evidence that magnetic poles can repel?
Which option is the best qualitative evidence that magnetic poles can repel?
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Two magnets push apart when like poles face each other. Similar magnetic poles create repulsive forces between magnets.
Two magnets push apart when like poles face each other. Similar magnetic poles create repulsive forces between magnets.
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What observation shows that a magnetic field can act through some materials?
What observation shows that a magnetic field can act through some materials?
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A magnet moves a paper clip even with paper or plastic in between. Magnetic fields pass through non-magnetic materials unimpeded.
A magnet moves a paper clip even with paper or plastic in between. Magnetic fields pass through non-magnetic materials unimpeded.
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Which option is qualitative evidence that a magnetic field is present near a wire?
Which option is qualitative evidence that a magnetic field is present near a wire?
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A compass needle deflects when current flows in the wire. Moving charges create magnetic fields that affect compasses.
A compass needle deflects when current flows in the wire. Moving charges create magnetic fields that affect compasses.
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What is the qualitative meaning of a stronger field when using iron filings around a magnet?
What is the qualitative meaning of a stronger field when using iron filings around a magnet?
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Filings are denser and more strongly aligned in that region. Stronger fields exert greater forces on magnetic materials.
Filings are denser and more strongly aligned in that region. Stronger fields exert greater forces on magnetic materials.
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Which option is the best evidence that Earth has a magnetic field?
Which option is the best evidence that Earth has a magnetic field?
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A compass needle aligns roughly north–south. Earth's magnetic field aligns magnetic compasses globally.
A compass needle aligns roughly north–south. Earth's magnetic field aligns magnetic compasses globally.
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Which observation is evidence that a magnetic field exerts a torque on an object?
Which observation is evidence that a magnetic field exerts a torque on an object?
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A compass needle rotates to point in a new direction. Magnetic fields apply turning forces to aligned magnetic objects.
A compass needle rotates to point in a new direction. Magnetic fields apply turning forces to aligned magnetic objects.
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Identify the best evidence that a magnet has two poles.
Identify the best evidence that a magnet has two poles.
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It can both attract and repel another magnet depending on orientation. Each pole creates different field interactions with other magnets.
It can both attract and repel another magnet depending on orientation. Each pole creates different field interactions with other magnets.
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Which option is qualitative evidence that two objects have like electric charges?
Which option is qualitative evidence that two objects have like electric charges?
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They repel each other. Like charges create fields that push each other apart.
They repel each other. Like charges create fields that push each other apart.
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Which observation best shows that an electric force can act at a distance?
Which observation best shows that an electric force can act at a distance?
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A charged balloon pulls hair upward without touching it. Electric fields exert forces across empty space without physical contact.
A charged balloon pulls hair upward without touching it. Electric fields exert forces across empty space without physical contact.
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Which option is the clearest evidence that a charged rod creates an electric field?
Which option is the clearest evidence that a charged rod creates an electric field?
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Nearby neutral paper bits move toward the rod without contact. Electric fields attract neutral objects through induced polarization.
Nearby neutral paper bits move toward the rod without contact. Electric fields attract neutral objects through induced polarization.
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What is qualitative evidence that a magnetic field affects an object?
What is qualitative evidence that a magnetic field affects an object?
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A visible effect such as attraction, repulsion, alignment, or deflection. Magnetic fields exert forces that cause observable changes in object behavior.
A visible effect such as attraction, repulsion, alignment, or deflection. Magnetic fields exert forces that cause observable changes in object behavior.
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What is qualitative evidence that an electric field affects an object?
What is qualitative evidence that an electric field affects an object?
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A visible change such as motion, attraction, repulsion, or deflection. Fields exert forces without direct contact, causing observable effects.
A visible change such as motion, attraction, repulsion, or deflection. Fields exert forces without direct contact, causing observable effects.
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Which observation is qualitative evidence that a neutral object became polarized in an electric field?
Which observation is qualitative evidence that a neutral object became polarized in an electric field?
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A neutral object is attracted to a charged object. Electric fields induce charge separation in neutral objects.
A neutral object is attracted to a charged object. Electric fields induce charge separation in neutral objects.
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Which observation best supports that electric and magnetic fields can pass through empty space?
Which observation best supports that electric and magnetic fields can pass through empty space?
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Forces occur without contact and without a visible medium. Fields transmit forces through vacuum, proving they're real.
Forces occur without contact and without a visible medium. Fields transmit forces through vacuum, proving they're real.
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What is the qualitative evidence that a magnetic field can exert a torque (turning effect) on an object?
What is the qualitative evidence that a magnetic field can exert a torque (turning effect) on an object?
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A compass needle rotates to align with the field. Magnetic fields exert torque to align magnetic dipoles.
A compass needle rotates to align with the field. Magnetic fields exert torque to align magnetic dipoles.
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Which observation is evidence that magnetic poles come in pairs and not singly?
Which observation is evidence that magnetic poles come in pairs and not singly?
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Breaking a magnet makes two smaller magnets, each with N and S. Shows magnetic monopoles don't exist in nature.
Breaking a magnet makes two smaller magnets, each with N and S. Shows magnetic monopoles don't exist in nature.
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What is the qualitative meaning of a stronger field at a location?
What is the qualitative meaning of a stronger field at a location?
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A greater force (or greater deflection) on a test object there. Field strength is measured by force on test objects.
A greater force (or greater deflection) on a test object there. Field strength is measured by force on test objects.
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What is an electric field?
What is an electric field?
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A region where electric charges experience a force. Fields exert forces on charges without physical contact.
A region where electric charges experience a force. Fields exert forces on charges without physical contact.
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What is a magnetic field?
What is a magnetic field?
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A region where magnets or moving charges experience a force. Fields exert forces on magnetic materials or moving charges.
A region where magnets or moving charges experience a force. Fields exert forces on magnetic materials or moving charges.
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Which observation is qualitative evidence of an electric field near a charged rod?
Which observation is qualitative evidence of an electric field near a charged rod?
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Small neutral bits of paper move toward the rod. Electric fields attract neutral objects through induced polarization.
Small neutral bits of paper move toward the rod. Electric fields attract neutral objects through induced polarization.
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Which observation is qualitative evidence of a magnetic field near a bar magnet?
Which observation is qualitative evidence of a magnetic field near a bar magnet?
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Iron filings form curved patterns around the magnet. Filings align with field lines, revealing the field pattern.
Iron filings form curved patterns around the magnet. Filings align with field lines, revealing the field pattern.
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