AQA Physics Paper 1 Accurate 100%

AQA Physics Paper 1 Accurate 100% conservation of energy - ANSWERlaw that says energy cannot be created or destroyed, but can change forms uses of friction - ANSWER- rubbing hands for warmth - break pads on bikes Increase efficiency - ANSWER- add lubricant - reduce friction internal energy - ANSWERthe sum of the kinetic and potential energies of all particles in the system Conduction - ANSWERThe direct transfer of heat from one substance to another substance that it is touching. Convection - ANSWERThe transfer of thermal energy by the circulation or movement of a liquid or gas convection current - ANSWERa current caused by the rising of heated fluid and sinking of cooled fluid Insulator - ANSWERA material that does not allow heat or electrons to move through it easily. Infra red radiation - ANSWERElectromagnetic waves of heat energy.