1. It’s electric
(don’t worry, I won’t play the
song)

2. 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

3. 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?

4. 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!

5. 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

6. 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

7. 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

8. 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

9. Conduction
 When charges can flow from one
object to another during contact or
when they are close enough
 They need to touch: conduction=
contact

10. Induction
 When electric charges are rearranged
 No contact is needed, things only come
near each other
 link
Balloon on the wall

11. links
 Electrophorus
 Induction
 Fun with a Van de Graaf Generator