It’s electric

(don’t worry, I won’t play the song)

Electrons

Are a small part of an atom They are found swarming around the

nucleus of atom They carry a negative charge When they move from atom to atom

that is electricity

Protons and Neutrons

Are found in the nucleus of the atom They stay put Protons are positive, neutrons are neutral

Normally, atoms are neutral due to equal number of protons and electrons

If you remove electrons from an atom, the atom becomes positive

Remember nuclear energy?

Electricity

Two forms: Static: When electrons build up on the

surfaces of objects and then jump away =(zap!)

Current: When electrons flow in a conductor (usually metal)

The above are NOT opposites!

Charge

Is a force that affects parts of atoms Things can have a positive charge, a negative

charge Neutral means zero charge Like charges repel Unlike charges attract

“opposites attract”Electroscope

Balloon on wall

Rolling tube

H2O

Electric field

The space around an object that is electrified or charged and exerts a force on other objects.

Fluorescent tube and van de Graff

Friction method

By rubbing 2 different materials together, electrons can sometimes build up on one material

All the electrons on that material try to get away from each other as best as they can

When they jump away= electric discharge.Van de Graaf generator

Positive / negative charges

Objects with a negative charge have an excess of ___________on their surface

Objects with a positive charge have a(n) _________ of electrons on their surface

Conduction

When charges can flow from one object to another during contact or when they are close enough

They need to touch: conduction= contact

Induction

When electric charges are rearranged

No contact is needed, things only come near each other

link

Balloon on the wall

links

Electrophorus Induction Fun with a Van de Graaf Generator