Electricity, Magnetism and Gravity

Two Balloons are rubbed with wool cloth. When the balloons are held near one another, they push away from each other. Why Does this happen?

• The balloons have the same magnetic charge, so they repel each other

• The balloons have opposite magnetic charge, so they repel each other

• The balloons have the same electric charge, so they repel each other

• The balloons have opposite electric charge, so they repel each other

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Which of the following is evidence that a magnetic field surrounds a magnet?

• When a paper clip is placed on a bar magnet, it sticks to the magnet

• When the north poles of two magnets are brought near each other, they push apart without touching

• When a magnet is placed on a metal surface, it sticks to the surface

• When you touch a metal doorknob, sometimes you receive a shock

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NGSS.MS-PS2-5

A magnet sticks to a table leg. Based on the information, which material could the table leg be made of?

• Iron

• Wood

• Copper

• Aluminum

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NGSS.MS-PS2-5

Two negatively charged particles are 1 millimeter apart. The electric force between them is 20 newtons. How will the amount of electric force between the particles change if the particles move closer together?

• The electric force will increase

• The electric force will decrease

• The electric force will stay the same

• The electric force will disappear

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NGSS.MS-PS2-5

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Select Two factors that affect the gravitational attraction between object?

• Density

• Distance

• Friction

• Mass

• Temperature

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An accumulation of excess electric charge is

• Static Electricity

• Gravitational Attraction

• Static Magnetism

• None of the Above

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Which is a conductor

• Glass

• Wood

• Copper

• Plastic

When two objects become charged by contact, which is true

• The net charge on each object does not change.

• Both become negatively charged.

• Both become positively charged.

• Electrons are transferred.

Which is true about two adjacent electric charges

• If both are positive they attract

• If both are negative they attract

• If one is positive and one is negative, they attract

• If one is positive and one is negative, they repel

Tags

NGSS.MS-PS2-5

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A ____________________ is a material through which electrically charged particles can easily flow.

• Insulator

• Semi-insulator

• Conductor

• None of the above