PS Unit 7 L2.1 - Analyzing Electric Charge

What is the physical property of matter that causes a spark when you touch a metal object?

• Magnetism

• Electric charge

• Density

• Mass

Tags

NGSS.MS-PS2-3

Which of the following represents a positive electric charge?

• −

• +

• 0

• *

What happens to the total number of positive and negative charges when an object’s net charge changes?

• It increases

• It decreases

• It remains the same

• It becomes zero

Explain why you might feel a shock when touching a doorknob after walking on a carpet.

• The carpet transfers positive charges to you, making you positively charged.

• The carpet transfers negative charges to you, making you negatively charged.

• The doorknob transfers negative charges to you, making you negatively charged.

• The doorknob transfers positive charges to you, making you positively charged.

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

How do opposite electric charges interact with each other?

• They repel each other

• They attract each other

• They have no effect on each other

• They neutralize each other

Tags

NGSS.MS-PS2-5

Describe what happens to the charges in a neutral object when a charged object is brought near it.

• Positive charges move towards the charged object

• Negative charges move towards the charged object

• Negative charges move away from the charged object

• Positive charges move away from the charged object

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

If a balloon is negatively charged and placed near a neutral wall, what happens to the charges in the wall?

• Positive charges in the wall move towards the balloon

• Negative charges in the wall move towards the balloon

• Positive charges in the wall move away from the balloon

• Negative charges in the wall move away from the balloon

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is the net charge of a neutral object?

• Positive

• Negative

• Zero

• Variable

Why do objects tend to have a net neutral charge?

• Because they have more positive charges than negative charges

• Because they have more negative charges than positive charges

• Because they have an equal number of positive and negative charges

• Because they have no charges at all

Tags

NGSS.MS-PS2-3

How can friction between two materials affect electric charges?

• It can increase the rate at which charges separate

• It can decrease the rate at which charges separate

• It can neutralize the charges

• It has no effect on the charges

Tags

NGSS.MS-PS2-3