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Name the 8 energy stores
Kinetic, gravitational potential, elastic potential, thermal, chemical, nuclear, magnetic, electrostatic
Name the 4 ways in which energy can be transferred
Heating, waves, electric current, mechanically
What is a closed system?
A system where no energy can be transferred to or from the surroundings
What is work done?
Energy transferred when a force moves an object
Describe the energy transfer when a moving car slows down
Energy is transferred mechanically from the kinetic stores of the car to the thermal store of its brakes. Some energy is dissipated to the thermal energy store of the surroundingsq
Describe the energy transfer when an electric kettle is used to heat water
The electric current in a kettle transfers energy to the heating element’s thermal store - energy is then transferred by heating from the hating element’s thermal store to the thermal store of the water
Describe the energy transfer when a ball is fired using an elastic band
Energy is transferred mechanically from the elastic store of the elastic band to the kinetic store of the band - some energy is dissipated to the thermal store of the surroundings
Describe the energy transfer when a battery powered toy car is used
Energy is transferred electrically from the chemical store of the battery to the kinetic store of the toy car - some energy is dissipated to the thermal store of the surroundings
Describe the energy transfer when a falling apple hits the ground
Energy is transferred from the kinetic store of the apple and dissipated to the thermal store of the surroundings by sound waves