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===Note to Teachers===
Students often don't recognise the difference between heating and burning. When asked what happens to a substance when it is heated they will say 'burn' when melting would be a more appropriate response. Students also do not always recognise the necessity of oxygen (or at least air) when things burn.
==Key Stage 3==
===Meaning===
'''Metal + Oxygen → Metal Oxide'''
: Magnesium + Oxygen → Magnesium Oxide: Aluminium + Oxygen → Aluminium Oxide: Iron + Oxygen → Iron Oxide