Systems Acting at Distance - Middle School Physical Science
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If a charged rod attracts small bits of paper without touching, what type of interaction is present?
If a charged rod attracts small bits of paper without touching, what type of interaction is present?
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A non-contact (electric field) interaction. Electric fields act through air without contact.
A non-contact (electric field) interaction. Electric fields act through air without contact.
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If a magnet and paper clip are separated by air and still attract, what type of interaction is it?
If a magnet and paper clip are separated by air and still attract, what type of interaction is it?
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A non-contact (magnetic field) interaction. Magnetic fields act through air without contact.
A non-contact (magnetic field) interaction. Magnetic fields act through air without contact.
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Identify the system that includes a distance interaction: two colliding billiard balls or Earth pulling a falling apple.
Identify the system that includes a distance interaction: two colliding billiard balls or Earth pulling a falling apple.
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Earth pulling a falling apple. Gravity acts on the apple without touching it.
Earth pulling a falling apple. Gravity acts on the apple without touching it.
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Which statement best identifies a distance interaction: force requires contact or force can act through a field?
Which statement best identifies a distance interaction: force requires contact or force can act through a field?
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Force can act through a field. Fields enable forces without physical contact.
Force can act through a field. Fields enable forces without physical contact.
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What is the rule for interaction between opposite magnetic poles (N-S)?
What is the rule for interaction between opposite magnetic poles (N-S)?
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Opposite poles attract. Different magnetic poles pull toward each other.
Opposite poles attract. Different magnetic poles pull toward each other.
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What is the rule for interaction between like magnetic poles (N-N or S-S)?
What is the rule for interaction between like magnetic poles (N-N or S-S)?
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Like poles repel. Same magnetic poles push each other away.
Like poles repel. Same magnetic poles push each other away.
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What is the rule for interaction between opposite electric charges?
What is the rule for interaction between opposite electric charges?
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Opposite charges attract. Different-sign charges pull toward each other.
Opposite charges attract. Different-sign charges pull toward each other.
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What is the rule for interaction between like electric charges?
What is the rule for interaction between like electric charges?
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Like charges repel. Same-sign charges push each other away.
Like charges repel. Same-sign charges push each other away.
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Which force can cause attraction or repulsion between two magnets without contact?
Which force can cause attraction or repulsion between two magnets without contact?
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Magnetic force. Magnets interact through magnetic fields at a distance.
Magnetic force. Magnets interact through magnetic fields at a distance.
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Which force can cause attraction or repulsion between two objects that have electric charge?
Which force can cause attraction or repulsion between two objects that have electric charge?
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Electric force. Charges interact through electric fields at a distance.
Electric force. Charges interact through electric fields at a distance.
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Which force is responsible for planets staying in orbit around the Sun without touching it?
Which force is responsible for planets staying in orbit around the Sun without touching it?
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Gravitational force. Gravity acts across space between Sun and planets.
Gravitational force. Gravity acts across space between Sun and planets.
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Identify the non-contact interaction: charged balloon pulling hair or shoe pushing a ball.
Identify the non-contact interaction: charged balloon pulling hair or shoe pushing a ball.
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Charged balloon pulling hair. Electric force acts through space without touching.
Charged balloon pulling hair. Electric force acts through space without touching.
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Identify the non-contact interaction: magnet attracting a paper clip or hand pushing a cart.
Identify the non-contact interaction: magnet attracting a paper clip or hand pushing a cart.
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Magnet attracting a paper clip. Magnetic force acts through space without touching.
Magnet attracting a paper clip. Magnetic force acts through space without touching.
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Which option describes a system with interaction at a distance: book on table or Earth and Moon?
Which option describes a system with interaction at a distance: book on table or Earth and Moon?
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Earth and Moon. Gravity acts between them without contact.
Earth and Moon. Gravity acts between them without contact.
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What is the name of the region around an electric charge where it can exert an electric force?
What is the name of the region around an electric charge where it can exert an electric force?
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An electric field. This field surrounds charges and affects other charges.
An electric field. This field surrounds charges and affects other charges.
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What is the name of the region around a magnet where it can exert a magnetic force?
What is the name of the region around a magnet where it can exert a magnetic force?
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A magnetic field. This field surrounds magnets and affects magnetic materials.
A magnetic field. This field surrounds magnets and affects magnetic materials.
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What does it mean for objects to interact at a distance in a system?
What does it mean for objects to interact at a distance in a system?
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They exert forces without touching, through a field. Fields mediate forces between separated objects.
They exert forces without touching, through a field. Fields mediate forces between separated objects.
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Which three forces are commonly classified as non-contact forces in middle school physical science?
Which three forces are commonly classified as non-contact forces in middle school physical science?
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Gravitational, magnetic, and electric forces. These forces act through fields without physical contact.
Gravitational, magnetic, and electric forces. These forces act through fields without physical contact.
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What is the name of the region around a mass where it can exert a gravitational force?
What is the name of the region around a mass where it can exert a gravitational force?
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A gravitational field. This field surrounds any mass and attracts other masses.
A gravitational field. This field surrounds any mass and attracts other masses.
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Which option is an interaction at a distance: a book on a table, wind pushing a kite, a magnet pulling a nail?
Which option is an interaction at a distance: a book on a table, wind pushing a kite, a magnet pulling a nail?
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A magnet pulling a nail. Magnetic force acts through space without contact.
A magnet pulling a nail. Magnetic force acts through space without contact.
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Identify the interaction type: Earth pulling the Moon into orbit with no touching.
Identify the interaction type: Earth pulling the Moon into orbit with no touching.
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Gravitational interaction at a distance. Earth's gravity pulls the Moon through empty space.
Gravitational interaction at a distance. Earth's gravity pulls the Moon through empty space.
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Which option describes a contact force rather than an interaction at a distance: gravity, magnetism, friction?
Which option describes a contact force rather than an interaction at a distance: gravity, magnetism, friction?
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Friction. Friction requires direct surface contact between objects.
Friction. Friction requires direct surface contact between objects.
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What field surrounds any object with mass and causes attraction between masses?
What field surrounds any object with mass and causes attraction between masses?
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Gravitational field. Mass creates a field that pulls other masses.
Gravitational field. Mass creates a field that pulls other masses.
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Which system shows interaction at a distance: two charges separated by air, two blocks pushed together, a hand pulling a rope?
Which system shows interaction at a distance: two charges separated by air, two blocks pushed together, a hand pulling a rope?
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Two charges separated by air. Electric forces act through empty space between charges.
Two charges separated by air. Electric forces act through empty space between charges.
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What are the two possible results of a magnetic interaction between two magnets?
What are the two possible results of a magnetic interaction between two magnets?
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Attraction or repulsion. Like poles repel; opposite poles attract.
Attraction or repulsion. Like poles repel; opposite poles attract.
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