1) Conduction of heat in a solid involves the particles passing on their... a) heat energy. b) kinetic energy. c) electrical energy. 2) Poor conductors are called... a) cotton wool. b) fluids. c) insulators. 3) Which heat transfer type(s) does a vacuum stop? a) Convection b) Conduction c) Radiation 4) A convection current occurs when heating a fluid because... a) heated fluid expands, becomes less dense and rises. The warm fluid is then replaced by cooler, denser fluid. b) heated fluid becomes more dense and rises. The warm fluid is then replaced by cooler, less dense fluid. c) the heat energy pushes the fluid around. 5) If you were designing a surface that would reflect radiation of heat, which of these would you choose? a) Dark and matt. b) Light and shiny. c) Bright and fluffy. 6) Which of these properties would NOT be suitable for a computer's cooling system? a) Large surface area. b) Light and shiny surface. c) Made from a good conductor. d) Good airflow. e) Dark and matt surface. f) Traps air in little pockets. 7) What is specific heat capacity? a) The amount of energy needed to raise the temperature of 1Kg of substance by 1°C. b) The amount of heat 1Kg of substance can take before melting. c) The amount of energy required to heat 1Kg of substance to a specific temperature. 8) The units for specific heat capacity are: a) J/Kg°C b) Kg°C c) °C/J.Kg

Heat energy transfer




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