Conductor vs. Insulator. Standard Students will understand features of static and current...
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Electricity
Conductor vs. Insulator
Standard
Students will understand features of static and current electricity and that electricity
is a form of energy
Review
Examples of Static
Electricity• Laundry sticking together • Hair standing up after jumping on a
trampoline• Combing or brushing clean dry hair• Getting “shocked” by someone• Shuffling across carpet • Lightning
How do you know
static electricity is present
• A crackling sound
• A spark can be seen and felt
• Items cling together
Lightning is a giant spark of static electricity thatforms in the clouds. Lightning is caused by the
movementof positive and negative charges toward one another.
During a storm the particles in a cloud become statically charged by the action of the wind blowing
Them around the cloud. The stronger source of static electricity moves towards the weaker source causing
the flash that we see as lightning.
What is Lightning?
What holds a static charge?
Metal, Wood and Glass
Plastic and Rubber
What does not hold a static charge?
What holds a week attraction?
Tissue Paper, Glitter, Sawdust, Paper Dots, Puffed
Rice
Erasers, Yarn, Pins, Paperclips
What holds a strong attraction?
Does everything hold a static charge?
No
Static Electricity:
Builds charges in one place
Current Electricity:A discharge of electricity that
moves along a pathway
Definitions
Incomplete Circuit:
A piece not connected – the light is off
Complete Circuit:A finished circuit with every pieceattached – the light is on
Definitions
Power Source:
The source of electricity = battery
Pathway:The path the electricity follows = wire
Definitions
Load:
Uses the electricity = light bulb
Switch:Opens and closes the pathway =
switch
Definitions
Illustrate the Circuit
Illustrate and Label a Switch
__________________________
__________________________
__________________________
__________________________
________________________________
load
pathway
pathway
switchpower source
How does changing the power
source affect the circuit?
The more batteries there are, the brighter the light
Power Source
How does changing the pathway
affect the circuit?
The more wires there are, the light doesn’t change
Pathway Source
How does changing the load affect
the circuit?
The more bulbs there are, dimmer the light
Load Source
How does changing the switch
affect the circuit?
All switches have to be in the on position in order for the light to turn
on
Switch Source
Electricity
Conductor vs. Insulator
Conductor:
A substance through which electricity passes easily
Insulator:A substance through which electricity
doesn’t pass easily
Resistor:A substance through which electricity passes with difficulty
Definitions
Experiment Time
What items were
conductors?Penny Pencil
(Wood)Pencil (Metal)
Eraser Paperclip
Nail Yarn Drinking Straw
Rubber Band
Popsicle Stick
What do they have in common? Electricity flows throughWhat do they have in common?
Why does electricity flow?They are made with a type of
metal
What items were
insulators?Penny Pencil
(Wood)Pencil (Metal)
Eraser Paperclip
Nail Yarn Drinking Straw
Rubber Band
Popsicle Stick
What do they have in common? Electricity doesn’t flowWhat do they have in common?
Why doesn’t electricity flow?They are not made with a type of
metal
What We Learned
We learned what type of items are conductors of
electricity and what items are insulators