You may also want to look at these simple animations.
Right click on the animation, and click play.
Teacher note:these basic animations are ok as visual cues, if you don't have access
to a range of toys and devices for demonstrations. They require
Adobe
Flash Player to run (PC only, no support for tablets or mobile
devices).
Task 3 - Energy Circus
Honk honk!
Is this REALLY the noise dinosaurs
made...?!
Strain energy.
Your teacher has
placed a
range of devices around the room. All of these devices
use and
produce energy.
1) desk lamp
2) candle
3) electric heater
4) airzooka
5) desk fan
6) squeaky horn or hand bell
7) animal "groan tube"
8) glow stick
9) wind-up toy
10) toy car at
the top
of a ramp
Visit each station in order.
Which types of energy can you identify?
Record your results in the table below.
Click
here
to download a copy of the table. There is also a blank version of the table
here,
if you wish to choose your own set of devices.
Task 4 - Energy transfer diagrams
Think hard!
Think about which forms of
energy are used by each device, and
which forms of energy
are produced.
We can show the energy changes
using an energy transfer diagram, like the one below:
Example - Energy changes in a
television
Now you draw some...
Think hard!
Draw energy transfer
diagrams for five devices from your table.
▪
Write the name
of the device by each diagram, and underline it.
▪
Draw the arrows using a
pencil and ruler.
▪
Write the types of energy
used, and the types of energy produced.
Extension:
1. Which types of
energy are useful, and which are wasted? Label them on
your energy transfer diagrams.
2. Find out what
efficient means. How is this related to the amounts of
useful and wasted energy?
Homework
The television.
Draw energy transfer
diagrams for the following devices:
1) A television
set
2) A washing
machine
3) A petrol
powered car, driving at night
4) A hairdryer
5) A wind turbine
Label each type of output energy
as either useful or
wasted.
This homework task is available as a word document.