Electric, Magnetic, and Gravitational Fields

Which choice best describes a gravitational field?

• A force that pulls people to the Earth.

• A bend in the space-time continuum that attracts masses together over a distance.

• A force that attracts oppositely charged particles.

• A bend in the space-time continuum that can attract and repel objects.

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NGSS.MS-PS2-4

NGSS.MS-PS2-5

Bob and Suzy are designing an electromagnet. Bob wants to add another battery to make the magnet stronger, and Suzy wants to add more coils to make the magnet stronger. Who is correct?

• Bob

• Suzy

• Neither Bob nor Suzy

• Both Bob and Suzy

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NGSS.MS-ETS1-1

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Which item could NOT be used as a core in an electromagnet?

• Wooden pencil

• Steel bolt

• Cobalt cylinder

• Nickel pen

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NGSS.MS-PS2-3

A proton (positive charge) and electron (negative charge) are attracted to one another. This is due to...

• Gravitational fields

• Electrical fields

• Magnetic fields

• Track and field

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NGSS.HS-PS2-4

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Which of the following materials will be attracted to a magnet?

• Tin can, aluminum foil, and cobalt keys.

• Nickel can, aluminum foil, and cobalt keys.

• Nickel can, iron watch, and cobalt keys.

• Iron watch, copper wire, and nickel can.

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NGSS.MS-PS2-3

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Which choice below shows a difference between gravitational fields, electrical fields, and magnetic fields?

• Gravitational fields are invisible, electrical and magnetic fields are visible.

• Gravitational fields can attract and repel, electrical and magnetic fields cannot.

• Gravitational fields involve positive and negative charges, electrical and magnetic fields involve poles.

• Gravitational fields can only attract, electrical and magnetic fields can both attract and repel.

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NGSS.MS-PS2-4

The amount of matter in an object and the pull of gravity on that object are two different things called...

• Velocity and volume

• Mass and weight

• Gravity and mass

• Velocity and weight

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NGSS.MS-PS2-4

The slowly churning liquid iron core of the Earth helps to explain why the Earth...

• Has an electrical field

• Has gravity

• Has a magnetic field

• Rotates on its axis

Which field deals with the attraction and repulsion of positive and negative charges?

• Gravitational

• Magnetic

• Alkaline

• Electrical

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NGSS.MS-PS2-3

Which poles would attract and which would repel on a magnet?

• North and south would attract, north and north would repel.

• North and north would attract, north and south would repel.

• South and north would attract, north and south would repel.

• South and south would attract, north and north would repel.

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NGSS.MS-PS2-3