the system can is no net change to the How can we reduce the Plan and carry out an may get students change. total energy. amount of energy being investigation to find out which thinking about the wasted by a machine? type of insulation will reduce design of buildings The energy Whenever there are energy What is the best way to reduce heat loss the most. and insulation. transfers in a transfers in a system only heat loss in the home? Good examples system are not part of the energy is Investigate how the thickness include: always useful. usefully transferred. The Presenting and writing of the insulating material Energy that is rest of the energy is descriptions and explanations: used affects heat loss. YouTube: transferred in a dissipated so that it is Presenting and writing arguments: Obtaining and presenting YouTube: way that is not stored in less useful ways. primary evidence: considered useful This energy is often Describe, in terms of energy Energy changes is often described described as being wasted. stores / work done, what happens Design a building that will that take place in a as being wasted. when an appliance (such as a have very low heating bills. rollercoaster: Unwanted energy transfers radio) is working. This can be a 2D or 3D Reducing can be reduced in a model it is possible using a – unwanted energy number of ways, for Evaluate the use of various types beaker of hot water and a Boardworks very – transfers. example, through of insulation in the home. Look in thermometer to find out how good sections on lubrication and the use of particular at the effectiveness of effective the insulation is in a this topic and Reducing heat thermal insulation. loft insulation and cavity wall 3D model that has been built. activities which loss from a home insulation. The rate of cooling of a can be done using by use of Investigate ways of reducing building is affected by the Communication for audience and Mini White Boards. insulation. the wasted energy transfer in thickness and thermal purpose: a rollercoaster so that a conductivity of its walls. – Design a poster to illustrate the marble dropped down a The higher the thermal reasons why insulating the home track will roll higher conductivity of a material; is beneficial for both the up the opposite side of the the higher the rate of homeowner and the environment. track. energy transfer by Select specific examples and conduction across the suggest what could happen if material. insulation was not used in the home.
the system can change. The energy transfers in a system are not always useful. Energy that is transferred in a way that is not considered useful is often described as being wasted. Reducing unwanted energy transfers. Reducing heat loss from a home by use of insulation. is no net change to the total energy. Whenever there are energy transfers in a system only part of the energy is usefully transferred. The rest of the energy is dissipated so that it is stored in less useful ways. This energy is often described as being wasted. Unwanted energy transfers can be reduced in a number of ways, for example, through lubrication and the use of thermal insulation. The rate of cooling of a building is affected by the thickness and thermal conductivity of its walls. The higher the thermal conductivity of a material; the higher the rate of energy transfer by conduction across the material. How can we reduce the amount of energy being wasted by a machine? What is the best way to reduce heat loss in the home? Presenting and writing descriptions and explanations: Presenting and writing arguments: Describe, in terms of energy stores / work done, what happens when an appliance (such as a radio) is working. Evaluate the use of various types of insulation in the home. Look in particular at the effectiveness of loft insulation and cavity wall insulation. Communication for audience and purpose: Design a poster to illustrate the reasons why insulating the home is beneficial for both the homeowner and the environment. Select specific examples and suggest what could happen if insulation was not used in the home. Plan and carry out an investigation to find out which type of insulation will reduce heat loss the most. Investigate how the thickness of the insulating material used affects heat loss. Obtaining and presenting primary evidence: Design a building that will have very low heating bills. This can be a 2D or 3D model – it is possible using a beaker of hot water and a thermometer to find out how effective the insulation is in a 3D model that has been built. Investigate ways of reducing the wasted energy transfer in a rollercoaster – so that a marble dropped down a track will roll higher up the opposite side of the track. may get students thinking about the design of buildings and insulation. Good examples include: YouTube: YouTube: Energy changes that take place in a rollercoaster: Boardworks – very good sections on this topic and activities which can be done using Mini White Boards.
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