Question Time Have you ever walked across a rug, reached a doorknob and…ZAP!!!! You get a static shock. What about coming inside from the cold and taking.

Question TimeHave you ever walked across a rug, reached

a doorknob and…ZAP!!!! You get a static shock.

What about coming inside from the cold and taking off your winter hat and all of a sudden your hair is sticking straight up?

What is happening?

Let’s Start from the BeginningAtoms- smallest particle that makes up all

matter.

Electrons-Negative charged particles that make up an atom. Orbit around the nucleus

Protons: Positively charged particles that make up an atom. Found in the nucleus

Neutrons: particles found in the nucleus thatdo not have a charge

Let’s Start from the BeginningAll Matter is entirely made of “electricity” yet

because the protons and electrons cancel each other out, we rarely encounter electrical effects in everyday life.

But……Which part of the atom can be removed?

The electron

What causes

What happens?

Electrons move from atom to atom

Moving ChargesConductors: an electrical conductor is a

material in which electrons can move easily through.Copper, Aluminum, and Mercury

Moving Charges

Insulators: an electrical insulator is a material in which electrons cannot move easily through.Plastic, rubber, glass, wood, and air.

An insulator can build up a static charge – it will hold the charge until the energy is released by a conductor

Electric ChargeLaw of electric charges: This law states that

like charges repel, or push away, and opposite charges attract.

Electric ForceThe force between two charge objects.

ELECTRON FORCE DEPENDS ON TWO THINGS:1. Amount of charge on an object2. The distance between the 2 objects; the closer the stronger.

Electric FieldThe region around a charge object in which

an electric force is exerted on another charged object.

What is Static Electricity?The Electric charge at rest on an object.When something is “static” it is not moving.An object that is statically charged keeps its

charge since it is not moving.

3 ways to charge an object

FrictionConductionInduction*Remember it’s all about the movement of electrons

FrictionElectrons are moved by force – “wiped” onto

another object

Example: Rubbing a balloon on wool

ConductionElectrons move from one object to another by DIRECT contactExample: Touching a doorknob while you are negatively charged.

Object is charged from being CONnected to the electric field

InductionElectrons are transferred when a neutral object

is near a charged object (in the electrical field)

Example: Sitting in class on a

chair with a metal base and

the electrons are transferring

on you by making your hair

statically charged

Object is charged from being IN the electric field

Electric DischargeThe loss of static electricity as charges move

off an object. Example: Lightning touching down on the

tallest object in a field.

Rotation Lab Tomorrow