Lesson number: Title (from syllabus sheet)

1
Date
4Energy Diagrams
Lesson Outcomes How I did Targets
Task 1Describe some energy transfer in appliances. Level 5
Task 2Explain why transfer may not be 100. Level 6
Task 3 Calculate running costs of an appliance over time. Level 7
Connector (Level 4) Name the different forms of
energy.
2
BIG picture

• What skills will you be developing this lesson?
• ICT
• Numeracy
• Literacy
• Team work
• Self management
• Creative thinking
• Independent enquiry
• Participation
• Reflection
• How is this lesson relevant to every day life?
  (WRL/CIT)

3
Whats the energy transfer?
Discuss the energy transfer involved in each
appliance with the person next to you.
4
Energy transfer in electrical circuits
5
Energy transfer in electrical circuits
Most of the energy from the battery does not
produce light most of it is wasted as heat!
6
Is all the energy useful to us?

• List the output energy as useful and wasted
  energy.

7
Discuss the energy transfer
8
Sankey diagram (Task 1)
15J
5J
35J
45J
100J
9
Draw the Sankey diagram (Task 1)
10
Task 1 (Level 5)

• Explain why energy transfer may not be 100.

11
Task 1 Review
Go back to your lesson outcome grid and fill out
the How I did and the Targets column.
Lesson Outcomes How I did Targets
Task 1 Level 5 Met? Partly met? Not met? How can I improve on task 1?
12
Calculating energy efficiency
This bulb converts 200 J of chemical energy from
battery into 10 J of useful light energy
13
New Information for Task 2

• This radio converts 200 J of chemical energy from
  battery into 20 J of sound energy
• Calculate the efficiency of the Radio.

14
Task 2

• This kettle converts 100 J of chemical energy
  from battery into 75 J of wasted sound and light
  energy.
• Calculate the efficiency of the kettle.

15
New Information for Task 2

• Calculate the efficiency of the fuel

16
Calculate its efficiency (Task 2)
17
Questions
18
Task 2 Review
Go back to your lesson outcome grid and fill out
the How I did and the Targets column.
Lesson Outcomes How I did Targets
Task 2 Level 6 Met? Partly met? Not met? How can I improve on task 2?
19
Measuring electricity
Electricity is measured in KWh, this is sometimes
called a unit
20
Questions
A Unit.
1.5 kW 0.08 kW
Energy transferred power x time
2 kW x 3 h 6 kWh
21
Cost of energy transfer
How can we calculate the cost of energy transfer ?
22
Electrical cost
23
Questions
50 kWh
300 p or 3
The same in both cases the number of
kilowatt-hours is 12.
36 p
8.64 p _at_ 9 p
24
Task 3 Review
Go back to your lesson outcome grid and fill out
the How I did and the Targets column.
Lesson Outcomes How I did Targets
Task 3 Level 7 Met? Partly met? Not met? How can I improve on task 3?
25
Homework

• Homework task
• Due date
• Criteria for level 5
• Criteria for level 6
• Criteria for level 7

26
Review of lesson