Changes

==Key Stage 3=====Meaning===A [[model]] is a simple version of a complex system used to help [[describe ]] and [[explain]] that system. ===About Models===: [[Model]]s are used to simplify ideas would otherwise be difficult to understand.: Some examples of [[model]]s you should know are::*The [[Dalton Model]] of the [[atom]].:*The [[Heliocentric Model]] of [[The Solar System]].:*The [[Particle Model]] of [[matter]]. ==Key Stage 4=====Meaning===A [[model]] is a simple version of a complex system used to help [[describe]] and [[explain]] that system. ===About Models===: [[Model]]s are used to simplify ideas would otherwise be difficult to understand.: Some examples of [[model]]s you should know are::*The [[Nuclear Model]] of the [[atom]].:*The [[Heliocentric Model]] of [[The Solar System]].:*The [[Particle Model]] of [[matter]].