Forms of Energy and Conservation
Energy comes in loads of different forms, and they're all around you every day. Chemical energy is stored in batteries, food, and fuel, whilst kinetic energy is the energy of moving objects. You've also got electrical energy (powering your devices), heat energy (from radiators), light energy (from the sun), and sound energy (from your music).
Here's the brilliant bit: energy can never be created or destroyed - this is called the Principle of Conservation of Energy. Energy just changes from one form to another. When you strike a match, chemical energy transforms into heat and light energy. When you speak into a microphone, your sound energy becomes electrical energy.
Energy is measured in Joules (J) - think of 1 Joule as roughly the energy needed to lift an apple one metre high. Simple examples include your phone battery converting chemical energy to electrical energy, or a car engine changing chemical energy from petrol into kinetic energy to make you move.
Quick Tip: Remember "My Granny Sees Every Kid Stealing Her Lemon Cake" to recall the energy types: Magnetic, Gravitational, Sound, Electrical, Kinetic, Strain, Heat, Light, Chemical!
