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Homework: Presentations for Transfer of Energy on April 24 th.
Energy transfer (change) A lamp turns electrical energy into heat and light energy
Sankey Diagram A Sankey diagram helps to show how much light and heat energy is produced
Sankey Diagram The thickness of each arrow is drawn to scale to show the amount of energy
Sankey Diagram Notice that the total amount of energy before is equal to the total amount of energy after (conservation of energy)
Efficiency Although the total energy out is the same, not all of it is useful.
Efficiency Efficiency is defined as Efficiency (%) = useful energy outputx 100 total energy input
Example Efficiency = 75 x 100 = 15% 500
Energy efficient light bulb Efficiency = 75 x 100 = 75% 100
Energy efficient light bulb Efficiency = 75 x 100 = 75% 100 That’s much better!
More complex examples
Read in silence pages 133-136.
Do now! Can you finish the questions you started last lesson?
New Topic Do some revision for tomorrow’s exam whilst you are waiting.
What is Energy?. “The capacity to do work” Not a very good definition!
Topic 8: Energy, power and climate change Can you read through the syllabus that Mr Porter is giving you?
P1 Physics Q2) Energy Transfer and Efficiency Nov 2015 exam revision.
© Boardworks Ltd of 35 Many household objects are designed to transfer energy from one form into another useful form. What is a useful energy transfer?
Some might: Compare efficient and inefficient devices Some might: Compare efficient and inefficient devices ENERGY EFFICIENCY most should : Apply the.
Energy efficiency & Sankey diagrams AS Physics. Efficiency Nothing is 100% efficient in converting energy from one form to another. A 40W light bulb is.
Energy transfers and efficiency. Energy cannot be created or destroyed. It can only be transferred from one form to another or moved. Energy that is 'wasted',
Physics 1 Revision Lesson 3 Energy transfer and efficiency.
Do now! 1 Energy Types Word Scramble 2 Title – Energy Flow diagrams and the date.
Energy basics. Temperature and Heat Temperature and heat are NOT THE SAME.
Energy transfers. What is a useful energy transfer? Many household objects are designed to transfer energy from one form into another useful form. What.
Sankey Diagrams. Why are they called Sankey Diagrams? Captain Henry Sankey (1853 – 1925) Captain Matthew Henry Phineas Riall Sankey was an engineer. In.
Energy Transfer Diagrams Starter Activity (back of jotters): 1)What are the 10 types of energy? 2)Draw an energy flow diagram for an ipod.
Objectives Recap the different types of energy and energy transformations. Outcomes C: Describe different types of energy. B: Explain energy transformations.
Topic 8: Energy, power and climate change. Topic 8 Overview 8.1 Energy degradation and power generation 8.2 World energy sources 8.3 Fossil fuel power.
Wasted energy Not all energy is changed into the type we want.
Some might: Compare efficient and inefficient devices Some might: Compare efficient and inefficient devices ENERGY EFFICIENCY most should : Apply the conservation.
© Boardworks Ltd of 35. © Boardworks Ltd of 35.
1 of 10© Boardworks Ltd of 10© Boardworks Ltd 2009 Kinetic energy is the energy an object has because it is moving. What is kinetic energy? The.
Efficiency To be able to calculate the efficiency of energy transfers Sunday, May 10, 2015.
Energy Transfer Sound energy Heat energy Chemical energyLight energy Gravitational potential energy Electrical energyKinetic energy Key wordPronunciationDefinition.
P3 Revision summary. Primary sources of energy. Fossil fuels. Nuclear fuel. Renewable energy sources. What does primary mean?
+ Energy Transfer Noadswood Science, Energy & Electricity To revise energy transfers and work out current and charge in an electric circuit Thursday,
7.4 Electric Lives 18 November 2015 You are buying a new TV, washing machine and fridge. What are the most important factors to consider when choosing.
Efficiency, Cogeneration and Energy Conservation 5/08.
Conservation of Energy Lesson Objectives: All must know that energy an be neither created nor destroyed but it can be changed from one form into another.
Types of Energy HeatChemical LightGravitational SoundElastic/strain KineticNuclear Electric.
© Boardworks Ltd A slide contains teacher’s notes wherever this icon is displayed - To access these notes go to ‘Notes Page View’ (PowerPoint 97)
© Boardworks Ltd of 20 © Boardworks Ltd of 34 KS3 Physics 9I Energy and Electricity.
P1b(ii) Keeping Homes warm You will learn about: How energy is lost from uninsulated homes About payback time About energy efficiency About Sankey diagrams.
© Boardworks Ltd of 20 © Boardworks Ltd of 40 The unit of measure for current is the amp, which has the symbol A. A Measuring current AA.
First in come to me Come to me Quick quick... there’s prizes... And pixies... And other nice stuff... Not really but you do get to be in charge of the.
Energy. What is energy? In science, energy is defined as the ability to do work. Work is done when a force makes and object move in the direction of the.
Two Ways to Conserve 1. Technology We should replace lights with more energy efficient lights 2. “Human Factors” We should teach and encourage the users.
Efficiency Ashfield Direct Learning Verity Payne Ks4 Energy.
Starter – List the nine forms of energy Conservation of energy.
DO NOW 1.DO NOT get your supplies 2.Take out your “Rube” ric 3.Homework: Edit/Revise Calorimeter Paragraph.
Level 4 Engineering Science Energy. Energy Unit When you have completed this unit you should be able to: Correctly identify various forms of energy Correctly.
Power and Energy Calculations. Power Ratings Power is the rate that an electrical device converts electrical energy into another form (ex. light or heat)
Lighting Efficiency. Lighting Efficiency Problem Suppose that 25 incandescent light bulbs rated at 100 Watt are replaced by 25 fluorescent lamps rated.
“ Energy can neither be created nor destroyed. It can only be changed from one form to another.” one “Energy cannot be created or destroyed. It can only.
Matter and Energy Hosted by Mrs LaBelle Jeopardy.
Energy Conservation. What is a Watt? Unit of measurement for power Amount of energy per time Used to measure amount of energy used Usually measured in.
What is Energy? Energy can come from the sun It is used to power your home Energy can be used to heat things It is used to create electricity.
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