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Science year 2.3: Electricity
Today
Reviewing 2.1 and 2.2
2.3 about electricity
Lesson up
Making exercises from the book
1 / 19
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Slide 1:
Tekstslide
Natuur, Leven en Technologie
In deze les zitten
19 slides
, met
interactieve quizzen
,
tekstslides
en
1 video
.
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Onderdelen in deze les
Today
Reviewing 2.1 and 2.2
2.3 about electricity
Lesson up
Making exercises from the book
Slide 1 - Tekstslide
Which types of energy do you know?
Slide 2 - Woordweb
conduction is heat transfer through...
A
solid materials
B
fluids and gasses
C
nothing
D
glass
Slide 3 - Quizvraag
What is a conductor
A
material that prevents heat from traveling
B
material that is very hot
C
material that lets heat travel easily
D
somebody that works in a tram
Slide 4 - Quizvraag
What is a catalyst?
A
something that makes substances burn
B
something that prevents materials to burn
C
something that increases the ignition energy
D
something that lowers the ignition energy
Slide 5 - Quizvraag
Learning goals
Slide 6 - Tekstslide
Name different sources of electricity
Slide 7 - Woordweb
1
Slide 8 - Video
02:33
What is an insulator?
A
a material that does not conduct electricity
B
a material that conducts electricity
C
a clamp to connect two electric wires
D
a electric source
Slide 9 - Quizvraag
What is electricity?
Electricity is caused by the flow of electrons moving through a conducting material
- Those electrons go from the power source to the device
- In the appliance they leave their energy behind
- They go back to the power source to be charged.
Slide 10 - Tekstslide
Slide 11 - Tekstslide
The plastic around the wire is an
insulator
(cable jacket and wire insulation)
The copper wire is a
conductor
(stripped wire)
Slide 12 - Tekstslide
phet.colorado.edu
Slide 13 - Link
Assignment
Make the following circuits work in the applet
- let a lightbulb burn with a battery
- let a lightbulb burn with a battery and a switch
- let 2 lightbulbs burn with a battery and a switch
Slide 14 - Tekstslide
There is a electrical current when...
A
the circuit is closed
B
when there is a electric source
C
when the wires are conductors
D
all three need to be true
Slide 15 - Quizvraag
Current
How many electrons flow past every second.
Measured in
Amps
(A)
with an am-meter
Slide 16 - Tekstslide
Voltage
How much electrical energy each electron is carrying.
Measured in
Volts
(V)
with a voltmeter
Slide 17 - Tekstslide
How much voltage is in an electric socket at your home?
Slide 18 - Woordweb
Voltage
The mains socket has a voltage of
230V
This can be
dangerous
and even
deadly
24V is the safe limit
Transformers raise/lower voltage
Slide 19 - Tekstslide
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