Electricity

Electricity

What causes static electricity?

What are two things needed for an electric current to flow?

Describe the characteristics of conductors, resistors, and insulators.

Open Ended

What would life be like without electricity?

History of Electricity

• Ancient Greeks noticed that amber produced a spark when rubbed with fur

• Edison changed the use of electricity with the light bulb

Determining Charge of Atom

Count the number of electrons and protons

If it has more electrons, it is negative.

More protons, positive charge

Static Electricity

• Occurs when electrical charges build up on the surface of an object

• One object gains an electron (negative charge), one loses an electron (positive charge)

Fill in the Blanks

The three types of electrical charges are positive,

, and neutral

Fill in the Blanks

When electrical charges build up on the surface of an object,

occurs.

Fill in the Blanks

Objects with like charges push against, or

, each other.

Fill in the Blanks

Objects with unlike charges pull toward, or

, each other.

Current Electricity

• Flow of electrons around a circuit

• There must be a circuit

• Must have a power source

• Open Circuit/Closed Circuit

Multiple Choice

A material that does not allow electricity to flow through it

• Conductor

• Insulator

• Resistor

Multiple Choice

A material that reduces the flow of electrons

• conductor

• insulator

• resistor

Multiple Choice

A material that allows electricity to flow through it easily

• conductor

• insulator

• resistor

Short Circuit

• Electricity flows through easiest path

• Sometimes takes an unexpected path

• Can cause sparks and fire

• Fuses and Circuit Breakers

Fill in the Blanks

Objects with unlike charges pull toward, or

, each other.