Science year 2.3: Electricity

Today
Reviewing 2.1 and 2.2

2.3 about electricity

Lesson up

Making exercises from the book
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Slide 1: Slide
Natuur, Leven en Technologie

This lesson contains 19 slides, with interactive quizzes, text slides and 1 video.

Items in this lesson

Today
Reviewing 2.1 and 2.2

2.3 about electricity

Lesson up

Making exercises from the book

Slide 1 - Slide

Which types of energy do you know?

Slide 2 - Mind map

conduction is heat transfer through...
A
solid materials
B
fluids and gasses
C
nothing
D
glass

Slide 3 - Quiz

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 - Quiz

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 - Quiz

Learning goals

Slide 6 - Slide

Name different sources of electricity

Slide 7 - Mind map

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 - Quiz

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 - Slide

Slide 11 - Slide

The plastic around the wire is an insulator (cable jacket and wire insulation)
The copper wire is a conductor (stripped wire)

Slide 12 - Slide

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 - Slide

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 - Quiz

Current 
How many electrons flow past every second.
 
Measured in Amps (A) 
with an am-meter

Slide 16 - Slide

Voltage 
How much electrical energy each electron is carrying. 
 
Measured in Volts (V) 
with a voltmeter

Slide 17 - Slide

How much voltage is in an electric socket at your home?

Slide 18 - Mind map

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 - Slide