Objectives Recap the different types of energy and energy transformations. Outcomes C: Describe different types of energy. B: Explain energy transformations.

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Presentation transcript:

Objectives Recap the different types of energy and energy transformations. Outcomes C: Describe different types of energy. B: Explain energy transformations from one type of energy to another. A: Evaluate useful and waste energy transfers and the impact this has on our energy needs. Key terms: Energy, useful, waste, efficiency, transformation.

Different types of energy 1.___________ 2.___________ 3.___________ 4.___________ 5.___________ 6.___________ 7.___________ 8.___________ 9.___________ Light Sound Kinetic Nuclear Electrical Chemical Elastic Gravitational Heat / Thermal

Useful energy transfers

Identifying energy transfers

200 J Electrical energy INPUT 10 J (useful) Light energy OUTPUT 190 J (wasteful) Heat energy OUTPUT Efficiency of a Light Bulb Efficiency = Useful Energy Output Total Energy Input Then multiply this by one 100 to find a percentage!!! Task: Calculate the efficiency of the light bulb? If it cost you £1 per day to use the light bulb. How much money is wasted by heat each week? Extension: Any ideas to save wasted heat energy??

Efficiency questions

Task In groups produce a poster outlining: Different forms of energy Energy transformations Energy efficiency Law of conservation of energy Outcomes C: Describe different types of energy. B: Explain energy transformations from one type of energy to another. A: Evaluate useful and waste energy transfers and the impact this has on our energy needs. Key terms: Energy, useful, waste, efficiency, transformation.