Select the word(s) to complete the word equation that matches the description of the reaction.
Electrolysis breaks down water to form hydrogen and oxygen gas.

A. The word equation that represents this reaction is: water A bright light is produced when magnesium reacts with the oxygen in air to form magnesium oxide.
B. The word equation that represents this reaction is: magnesium oxygen When methane burns, it reacts with oxygen to produce water and carbon dioxide.
C. The word equation that represents this reaction is: methane oxygen