Transcript Electricity_1

Circuits
Warm-up
What type of energy is
the energy stored in
batteries?
What type of energy did
we show with your
spinning windmills
A.Kinetic
B.Elastic
C.Chemical
D.Thermal
Kinetic / potential ?
Renewable / Nonrenewable Resource?
KEY “UPCOMING” Terms
Static electricity
Law of conservation of
charge
Electric field
Conductor
Insulator
Charging by contact
Charging by induction
Grounding
Electroscopes
Electric current
Electric circuits
Dry cell batteries
Wet cell batteries
Lead cell batteries
Static electricity
The accumulation of excess
electric charge on an object
Law of Conservation of Charge
States that charge can be transferred from
object to object
BUT
It cannot be created NOR destroyed
Electric field
An electric field surrounds every electric charge
and exerts the force that causes other electric
charges to be attracted or repelled.
Conductor
Is a material through which
electrons move easily.
Insulator
An insulator is a material in which electrons are
not able to move easily.
WHY?
Electrons are held more tightly to the atoms that
make up insulators.
WHOLE BRAIN
In a minute..you will turn to your partner and
discuss
-Static electricity
-Law of conservation of Charge
- Electric field
-conductors (name 1)
- Insulators (name 2)
Charging by Contact
The process of transferring charge
by touching or rubbing.
Charging by Induction
The rearrangement
of electrons on a
neutral object
caused by a nearby
charged object.
Lightning
Thundercloud = “mighty” static electricity
generator
Lightning
Thundercloud = “mighty” static electricity
generator
Areas of positive / negative charge build up
Lightning
Thundercloud =
“mighty” static
electricity generator
Areas of positive /
negative charge
build up
Static discharge
between the clouds
and the ground
happens.
Grounding
Before you mess with wires (electricians)….you
must ground yourself …by touching a piece of
metal
Grounding
Before you mess with wires (electricians)….you
must ground yourself …by touching a piece of
metal
Your house can be grounded to…….metal
lightening rod that provides a conducting path
from the highest point…..to the ground
WHOLE BRAIN
In a minute, you will turn to your partner and
discuss
-Charging by contact
- Charging by induction
- Lightening
- Grounding (electricians)
- grounding (for houses)
Electroscope
A device that can detect electric charge
Electric Circuit
Is a closed path that electric
current flows.
Current = electrons
Voltage Difference
Is related to the force that causes
electric charges to flow.
Voltage Difference
Is related to the force that causes
electric charges to flow.
Voltage difference is measured in
volts (V).
QUESTION
What does closed mean?
Hold up your hands and show a closed
circle……..
Closed circuits
• Closed circuits is circuits where the electricity
is flowing……..no gap……electricity can go all
the way around in a circle.
• Closed circuits = Everything works (light bulb is
on)
Question
What does open mean?
Hold up your hands and show an open circle….
Open circuit
• An open circuits is when the electricity can not
flow (since it needs to go all the way around in
a circle to flow)
• Open circuits = nothing works (light bulb is off)
QUESTION
So TO RECAP…….which circuit the the
lightbulb not light?
And WHY?
WHOLE BRAIN
In a minute, you will turn to your partner and
discuss
-electroscope
- electric Circuit
- Voltage difference
- Closed circuit
- Open circuit
Dry cell battery
Example: batteries
The cell has 2
electrodes surrounded
by a material called an
electrolyte.
Electrolyte = moist
paste
Wet cell battery
Example: Car battery
Contains 2 connected plates made up of
different metals or metallic compounds in an
electrolyte.
ELECTROLYTE = conducting liquid solution
Lead Acid batteries
Contains a series of six wet cells composed of
lead and lead dioxide plates in a sulfuric acid
solution.
Example: car batteries/others
WHOLE BRAIN
In a minute, you will turn to your partner and
discuss
-electroscope
- electric Circuit
- Voltage difference
- Closed circuit
- Open circuit
STOP
COLLABORATIVE ACTIVITY TIME