energy junior cert science

energy

the ability to do work

kinetic energy

the energy of moving objects

heat energy

heat causes particles to vibrate

electrical energy

movement of electrons

light energy

electromagnetic radiation

sound energy

produced by vibrating objects

gravitational potential energy

stored in raised objects eg swings

elastic potential energy

stored in stretched or squashed objects eg stretched rubber band

chemical potential energy

stored in bonds of molecules eg food

nucleur potential energy

stored in the nucleus of an atom

the law of conservation of energy

energy cannot be created or destroyed it can only change from one form to another or be transferred from one object to another

unit of energy

joules

energy dissipation

energy that is lost to the surroundings as less useful forms