AQA Physics Unit 1 0.0 / 5 ? PhysicsGCSEAQA Created by: emilyCreated on: 09-04-13 18:28 Energy Transfers By Heating 1 The Easth's atmosphere is like a greenhouse The infrared rays enter the atmosphere and warm up the Earth Things like water vapour and CO2 stop infrared from being able to escape which makes the Earth even warmer This could be bad if the polar ice caps melt If this happens the Earth will flood 1 of 4 Energy Transfers By Heating 2 Dark, Matt surfaces are BETTER EMITTERS of radiation than light, shiny surfaces. Light, shiny surfaces ABSORB LESS radition than dark, matt surfaces Light, shiny surfaces REFLECT MORE radition than dark, matt 2 of 4 Energy Transfers By Heating 4 Conduction of energy happens most in metals becuase the free electrons inside the metal transfer energy Non metals dont contain free electrons so they dont conduct energy as well The transfer of energy in materials is a result of kinetic energy in the particles 3 of 4 Energy Transfers By Heating 5 Convection happens in fluids (gas, liquid) It is the movement of the fluid due to it being heated up When it is heated it becomes less dense and so it rises This causes circulation within the fluid 4 of 4
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