energy transfer and using energy 0.0 / 5 ? PhysicsEnergyGCSEAQA Created by: rhoudaCreated on: 08-12-13 16:19 what is infrared radiation part of? it is part of the spectrum 1 of 27 how can we detect infrared radiation? through our skin it makes us feel warm 2 of 27 what does infrared radiation travel through it travels through a vacuum 3 of 27 what is a good absorber? dark matt surfaces 4 of 27 why are houses in hot countries often painted white because white reflects heat back and will keep the house cool and not hot 5 of 27 what is a good emitter? dark matt surafces 6 of 27 what will a dull black object do? transfer heat quicker and cool down quicker 7 of 27 what are good reflectors of infrared radiation? light shiny surfaces 8 of 27 what can heating and cooling substances do? it can change it from any of the three different states of matter 9 of 27 what do the particles in a solid do? they vibrate about fixed positions and they have fixed shapes 10 of 27 what do the particles in a liquid do? they are in contact with each other and move about they do not have fixed positions 11 of 27 what do the particles in a gas do? they are far apart and move at random doesnt have a fixed shape and can flow 12 of 27 what does conduction occur in? in solids and metals 13 of 27 how is energy transferred in solids the particles at the end of the solid vibrate more and gain kinetic energy then pass the energy through to neighboring particles 14 of 27 what happens when metals are heated? they gain kinetic energy making them move through metal faster and they transfer energy by colliding with other particles 15 of 27 what are poor conductors they are insulators 16 of 27 why are materials that trap air good insulators because the particles move around more freely 17 of 27 what does convection occur in? in fluids 18 of 27 what happens when convection happens in fluids? they expand when heated and become less dense and rise. 19 of 27 what happens to warmer fluids? they get replaced by cooler denser fluids 20 of 27 why does convection only occur in fluids? because it requires the movement of atoms and molecules within fluids 21 of 27 what is evaporation? liquid is turned into gas 22 of 27 how does evaporation happen? most energetic liquid molecules escape the liquids surface and enter the air. 23 of 27 how is the rate of evaporation increased? increasing the surface area of the liquid and increasing the temperature of liquid and creating a drought of air across liquids surface 24 of 27 what is condensation? gas turning into a liquid 25 of 27 where does condensation often happen? on cold surfaces 26 of 27 how is the rate of condensation increased? increasing the surface area and reducing the surface temperature 27 of 27
Comments
No comments have yet been made