Transcript Energy transfers and transformations

20 July, 2015
Energy Types
Objectives
Be able to recall the different types of energy and
how energy can be transferred and transformed.
HSW: AF3: Select appropriate methods for presenting scientific data.
Used before in:
Will use again in: Lesson 2 –
Energy Transformations
PLTS: Independent enquirers: support conclusions, using reasoned arguments and evidence.
Used before in:
Will use again in:
Keywords
Energy types: GPE, Chemical, Elastic (strain), Kinetic, Nuclear,
Thermal, Sound, Light (Radiation), Electrical, Energy resources,
Transfer, Transformation
Outcomes
All students should be able to:
• Recall 9 types of energy.
Most students should be able to:
• Describe how energy types are different from energy
resources.
• Describe how energy can be transferred from one
thing to another.
Some students should be able to:
• Draw energy transfer diagrams to describe energy
transfers and transformations and know that energy
can be useful or wasted.
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The 9 types of energy
Type
Heat
Kinetic (movement)
Nuclear
Sound
Light
Chemical
Electrical
Gravitational potential
Elastic potential
3 example sources
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Movement
Gravitational
Chemical
Sound
Electrical
Sound
Heat
Light
Electrical
Nuclear
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Most
G
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Students
Hate
Learning
Energy
Names
Energy transfer
Many household objects are designed to transfer energy from
one form into another useful form.
What energy transfer is an electric fan designed to carry out?
electrical
energy
kinetic
energy
What is a useful energy transfer?
What energy transfer are these speakers designed to
carry out?
electrical
energy
sound
energy
What is a useful energy transfer?
What energy transfer are wind turbines in a wind farm
designed to carry out?
kinetic
energy
electrical
energy
What is a useful energy transfer?
What energy transfer is a hydroelectric power station
designed to carry out?
gravitational
potential energy
electrical
energy
Useful energy transfers
Energy changes
To describe an energy change for a
light bulb we need to do 3 steps:
This is an energy transfer diagram:
1) Write down the
starting energy:
2) Draw an arrow
Electricity
3) Write down
what energy types
are given out:
Light + Heat + Sound
What are the energy changes for the following…?
1) An electric fire
2) A rock about to drop
3) An arrow about to be fired
Extension:
Label the useful and wasted
energy types.
Practical Time
Energy Circus
1 Draw a labelled diagram of the equipment.
2 For each system draw an energy transfer diagram.
3 Label the useful and wasted energy types.
Extension
Copy:
Energy can be transferred from one thing to another.
Energy can be transformed from one type to another.
Now:
Write down an example of energy being transferred from
one thing to another.
Write down an example of energy being transformed from
one type to another.
Plenary
The Big Q: The Switches Riddle
All: Write down the 9 types of energy and circle
the ones that will be involved here.
Most: Draw the energy flow diagram for a lightbulb.
Some: Describe the useful and wasted energy and
explain how this helps you solve the riddle.
PLTS: support your conclusion with evidence
There are 3 switches
outside a room, 1
of them turns on a
light inside the
room. You can
switch the
switches as much
as you like but you
can only open the
door to check
once. How do you
know which one
switches the light
on?
Homework
• Complete the homework sheet by: date