Today: Cornell Notes

• See me for your NEW SEAT NUMBER

• Get paper for CORNELL NOTES

• TOPIC: ELECTRIC CHARGE• Essential Question: How

does electric charge behave and how do we create charged objects?

How many types of charge are there?

• Sticky Tape Lab• Two Types of Charge• Benjamin Franklin

called them “Positive” and Negative”

What rules do they follow?

• Two “top” tapes repel• Two “bottom” tapes

repel• A “top” and a

“bottom” tape attract• So: Like charges

repel, opposite charges attract

What causes this charge?

• Electrons and Protons • Electrons are negative• Protons are positive• (Rutherford discovered

that the nucleus of an atom has a positive charge)

Review: Bill Nye the Science Guy

• 2:15 – 4:46• How did Bill get the

charges onto his Rockin’ Hair?

Separation of Charge

• He SEPERATED the charges!• There’s no such thing as an object

with NO charges – everything has charges!

• Usually the positives and negatives cancel each other out.

• To make a “charged” object – you have to move the charges around.

• To make a “negative” object – gather up a bunch of electrons.

• How do you make a “positive” object?

Conductors and Insulators

• Insulators – charges do NOT move easily

• Conductors – charges DO move easily

• Examples?• Air is USUALLY an

insulator – when is it not?

Charging by Conduction(Basically, by touching)

Separation of Charge on Neutral Objects

• Yeah, but how did your charged tape attract the neutral paper without touching it? Or the charged balloon stick to the neutral sweater? Why was Bill’s “Silver-Painted Ball” attracted to his charged wand?

• This is like the Balloon and the Wall in the lab from Friday

Charging by Induction(Basically – without touching)

Bill Nye Says: Consider The Following

• What do we mean by Grounding the charge?

• 7:36 – 9:07