EMF pg 31-37 "What is Electricity?"

Electrons have a _______ charge.

• Positive

• Negative

• Neutral

• No Charge

Answer explanation

Electrons have a negative charge. Flowing electrons create electricity.

Tags

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Two negative charges will

• Attract

• Repel

• Not interact

Answer explanation

Just like magnets, opposites attract and like charges repel. A positive charge will be attracted to a negative charge. Two positive charges repel. Two negative charges repel.

Tags

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You rub a balloon on your hair and your hair gains electrons from the balloon. Why does the balloon then stick to a wall?

• The balloon is more positively charged than the wall.

• The balloon would not stick to the wall.

• The balloon has the same charge as the wall.

Tags

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A material that blocks the flow of electricity is called an (a)   .

Batteries change _______ energy into electrical energy.

• Chemical

• Kinetic

• Thermal

• Electrical

Do all materials conduct electricity equally well?

• Yes

• No

Electric charge that does not move is called _________.

• Stationary Electricity

• Electrical Current

• Static Electricity

• Kinetic Electricity

How many lightning bolts strike earth every second?

• 1

• 16

• 0.5

• 44

Why does your hair stick to a balloon after rubbing them together?

• The balloon becomes positive and your hair becomes negative.

• Your hair and the balloon become electromagnets.

• The balloon transfers energy to your hair.

• The plastic in the balloon is sticky.

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Of these choices, which material conducts electricity the best?

• Nickel

• Copper

• Cobalt

• Iron