NGSS.MS-PS2-3

When two objects have opposite charge (+ and -), they are:

• Attracted to each other
• Repelled by each other
• Have no effect on each other

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NGSS.MS-PS2-3

The girl's hair and the comb are attracting  one another.  The hair and the comb have

• opposite charges
• like charges

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NGSS.MS-PS2-3

Which is NOT a conductor

• 
• 
• 
• 

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NGSS.MS-PS2-3

What is the shape of a magnetic field around a wire?

• 
• 
• 
• 

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NGSS.MS-PS2-3

Look at the set of objects to the right. We could

increase the electric force between Object A and

Object B by each of the following EXCEPT:

• Pushing them farther apart.

• Increasing the difference between their charges.

• Moving them closer together.

• Adding lots of negative charges to Object A.

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NGSS.MS-PS2-3

Mrs. Davis rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?

• The balloons will repel each other.

• The balloons will attract each other.

• The balloons will become positively (+) charged.

• The balloons will pop.

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NGSS.MS-PS2-3

The image above shows how iron filings respond to magnetic fields generated by two magnets with ____________ poles facing each other.

• like

• opposite

• positive

• negative

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NGSS.MS-PS2-3

Which electromagnet is stronger?

• A

• B

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NGSS.MS-PS2-3

Which electromagnet is stronger?

• A

• B

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NGSS.MS-PS2-3

(Choose all that apply) Which of these would decrease the power of an electromagnet?

• Decrease the distance to the power source.

• Decrease the thickness of the wire.

• Decrease the amount of current running through the wire.

• Decrease the length of the wire.

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NGSS.MS-PS2-3