science trimester 3 unit 4

The image shows the electric field lines around two charged particles.

At which position would the electric force be greatest?

• 1

• 2

• 3

• 4

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

How does an object become negatively charged?

• It gains electrons.

• It loses electrons.

• It gains protons.

• It loses protons.

How does increasing the distance between charged objects affect the electric force between them?

• The electric force increases because the distance has an indirect relationship to the force.

• The electric force increases because the distance has a direct relationship to the force.

• The electric force decreases because the distance has an indirect relationship to the force.

• The electric force decreases because the distance has a direct relationship to the force.

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NGSS.MS-PS2-3

For which pair of objects would adding the same amount of electrons to each object result in a decrease in the electric force?

• two positively charged objects

• two negatively charged objects

• two objects that have no charge

• two objects that have opposite charges

Tags

NGSS.MS-PS2-3

Two balls are placed near one another and hang down, as shown below.

Which conclusion is supported by this evidence?

• Neither ball has a charge.

• The balls are both positively charged.

• One ball is positively charged, and the other is negatively charged.

• Each ball has a charge, but the type of charge is unknown.

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

The diagram shows two charged objects, X and Y.

Based on the field lines, what are the charges of the objects?

• X: positive

  Y: negative

• X: negative

  Y: positive

• X: negative

  Y: negative

• X: positive

  Y: positive

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which change increases the electric force between objects?

• Two neutral objects are moved closer together.

• Electrons are added to two negatively charged objects.

• Two oppositely charged objects are moved farther apart.

• The charge on two positively charged objects is reduced.

Tags

NGSS.MS-PS2-3

How does increasing the amount of charge on an object affect the electric force it exerts on another charged object?

• The electric force increases because the amount of charge has an indirect relationship to the force.

• The electric force increases because the amount of charge has a direct relationship to the force.

• The electric force decreases because the amount of charge has an indirect relationship to the force.

• The electric force decreases because the amount of charge has a direct relationship to the force.

Tags

NGSS.HS-PS2-4

Tisa makes a diagram to organize her notes about charging objects.

Which statement should she place in the region marked X?

• Electrons move between objects.

• The objects do not touch.

• The objects develop opposite charges.

• The objects have the same charge.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

The area around a charged object where the object can exert a force on other charged objects is an electric

• field

• charge

• induction

• force

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5