Electricity Review

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

• opposite charges

• like charges

Tags

NGSS.MS-PS2-3

Lightning occurs because ___. 

• the negative charges at the bottom of clouds are attracted to the positive charges on the ground.

• the positive charges at the bottom of clouds are attracted to the negative charges on the ground.

• the positive and negative charges inside clouds are attracted to each other

• All of these reasons are correct.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Walking across a carpet is an example of charge being transferred by

• friction.

• induction.

• contact.

• static electricity

Tags

NGSS.MS-PS2-3

Why do lightning rods need to be grounded?

• They don't. The rod is enough to protect the home

• to create a path for the electricity to get to the ground

• to direct the electricity to the power grid of the house

• to deflect the electricity back into the cloud

What charge does an electron have?

• negative (-)

• positive (+)

• neutral or no charge (0)

Electric charges that are alike _______ each other.

• Attract

• Repel

Tags

NGSS.MS-PS2-3

Ms Jo Jo 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.

Tags

NGSS.MS-PS2-3

If an object has the same number of positive and negative charges, its electrical charge is...

• positive

• negative

• neutral or no charge

• opposite

If an object has more negative charges than positive charges, its electrical charge is...

• positive

• negative

• neutral or no charge

• opposite

Tags

NGSS.MS-PS1-1

A pathway for electricity to travel is called___________

• current

• static electrcity

• circuit

• circle

Tags

NGSS.MS-PS2-3