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Physics 1

Physics 1. Energy & Temperature. C/W Energy Transfer 27-Nov-14. Aims:- 4 list energy forms 5 draw energy transfer diagrams 6 explain what efficiency means Starter – 5 minutes Write down as many different forms of energy as you can think of e.g. heat energy. Copy notes – 2 minutes.

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Physics 1

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  1. Physics 1 Energy & Temperature

  2. C/WEnergy Transfer27-Nov-14 Aims:- 4 list energy forms 5 draw energy transfer diagrams 6 explain what efficiency means • Starter – 5 minutes • Write down as many different forms of energy as you can think of e.g. heat energy

  3. Copy notes – 2 minutes • There are nine forms of energy; four stored and five ‘on the move’ … StoredMoving Chemical Kinetic (movement) Elastic Heat Gravitational Light Nuclear Sound Electrical

  4. Copy notes – 5 minutes • Energy is measured in joules (J) and never gets used up – it is “conserved” • When something happens, energy is being changed from one form into another • e.g. dropping a ball turns gravitational energy into kinetic energy • e.g. using a toaster turns electrical energy into heat energy

  5. Activity – 15 minutes • Cut out 4 devices from the catalogue • Decide what energy changes they cause • Stick-in the picture and add arrows to show the energy transfers, like this … Extension: make up numbers of joules to add to the arrows Heat Electrical Sound

  6. Copy notes – 2 minutes • Some energy transfers are useful and others are wasted • e.g. a light bulb transfers energy usefully as light, but wastes energy as heat • Devices that waste less energy are called energy efficient

  7. Activity – 10 minutes • On your arrows, highlight the transfers that are useful and wasted using different colours Extension: work out how efficient the device is using your numbers  Heat Electrical Sound 

  8. Plenary – Questions – 10 mins • What form of energy is stored in a battery? • What is the unit of energy? • If 100J of energy goes into a kettle, and 90J is converted to heat, how much sound energy comes out? How do you know? • What device turns sound energy into electrical energy?

  9. Homework • Either (easier) • Do three more devices using pictures from the newspaper or magazines at home • Or (harder) • Make a chart with all forms of energy on it and lines joining them up – on the lines write the name of a device that converts those types of energy into each other

  10. Are You On Target Today? Aims:- 4 list energy forms 5 draw energy transfer diagrams 6 explain what efficiency means

  11. C/WEnergy Resources27-Nov-14 Aims:- 4 name some energy resources 5 describe how they are useful 6 compare their pro’s and con’s • Starter – 5 minutes • Which energy resources are these? We ‘av Sam is bo! Can rule Is full of e’s Arsol

  12. Copy notes – 5 minutes • Energy resources are used to generate electricity by turning a turbine attached to a generator • Resources which will not run out are called renewable • Fossil fuels (coal, oil and gas) are non-renewable • Burning fuels releases carbon dioxide into the atmosphere which may cause global warming

  13. Practical – Wind Power – 30 mins Turbine • Set-up the equipment as shown • Draw a labelled diagram • Record the voltage generated with the hairdryer at different distances from the turbine • Plot a graph of your results Generator Cork Wires to COM and VΩmA holes Slots for cardboard vanes Voltmeter on 200mV

  14. Plenary – Questions – 10 mins • What did you find out from the experiment? (Hint: The more … the more …) • How did you make it a fair test? • List three fossil fuels • What does renewable mean? • List three renewable energy resources

  15. Homework • Everyone (easier) • Find two examples of ‘biomass’ and describe them (include one pro and one con) • Extra for superstars (harder) • Find out what ‘hydroelectric’ power is, and draw an energy transfer diagram (Hint: it has three steps ending with ‘electrical’) For help on both, look on: http://home.clara.net/darvill/altenerg/index.htm Email Word docs to drwelch@teacher.com

  16. Are You On Target Today? Aims:- 4 name some energy resources 5 describe how they are useful 6 compare their pro’s and con’s

  17. C/WWhat is Heat?27-Nov-14 Aims:- 4 know that heat flows from hot to cold 5 describe what happens when heating 6 explain features of a cooling curve Starter – 5 minutes – True or False? • Heat is a form of energy • Heat is measured in ºC • Heat rises • There are particles of heat • A fridge door stops the cold getting out

  18. C/WWhat is Heat?27-Nov-14 Aims:- 4 know that heat flows from hot to cold 5 describe what happens when heating 6 explain features of a cooling curve Starter – 5 minutes – True or False? • Heat is a form of energy • Heat is measured in ºC • Heat rises • There are particles of heat • A fridge door stops the cold getting out

  19. Copy notes – 5 minutes • Heat is a form of energy • Heat energy moves from areas of high temperature (hot) to areas of low temperature (cold) • Remember: Heat energy can move to or from the surroundings (the air)

  20. Copy notes – 5 minutes • When something absorbs heat energy • its particles move faster • it expands and • its temperature goes up … • … until it melts/boils, then • its particles spread apart and • its temperature stays the same while it is melting/boiling.

  21. Watch Animation Play ‘heating’ in ‘KS3 Resources’

  22. Watch Demo Datalog stearic acid curve

  23. Copy and label graph from demo

  24. Plenary – Interactive DnD ‘particles’ in ‘Whiteboard’

  25. Homework • Everyone (easier) • Describe what happens to an ice cube left out in a warm room – use these words: ‘heat’, ‘energy’, ‘flow’, ‘temperature’, ‘melt’, ‘particles’, ‘surroundings’ • Extra for superstars (harder) • Explain why the temperature of water in a pan never goes above 100ºC no matter how much heat you put in (Think: where is heat also getting out?)

  26. Are You On Target Today? Aims:- 4 know that heat flows from hot to cold 5 describe what happens when heating 6 explain features of a cooling curve

  27. C/WHow is Heat Transferred27-Nov-14 Aims:- 4 know four ways for heat to flow 5 describe how each is different 6 explain each using a particle model • Starter – 5 minutes • What is this dingbat? HOT!

  28. Copy notes – 2 minutes • Heat can be transferred in four ways: • Conduction • Convection • Radiation • Evaporation

  29. Find Out and Explain • Heat can be transferred in four ways: • Conduction p106p8, 50 p84 p4.7 • Convection p110p8-9, 50-1 p84 p4.7 • Radiation p112p9-11, 51 p84 p4.7 • Evaporation p115 Pages in orange in orange book (Heinemann 2) Pages in blue in blue book (Physics by Milner) Pages in purplein purple book (Physics for AQA) Pages in yellow in yellow book (Modular Science)

  30. Demo’s When finished, draw and explain each demo in your own words Wood/metal rod, conv ring, alcohol

  31. Homework • Revision for test

  32. Are You On Target Today? Aims:- 4 know four ways for heat to flow 5 describe how each is different 6 explain each using a particle model

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