Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button if available to get a clue. Note that you will lose points if you ask for hints or clues!
air aluminium burning burns Cal calcium oxide element etrol heat energy Iron iron oxide magne magnesium oxide oxidation oxide Oxides oxygen Oxygen paper woo