Answer the following question given this paragraph: 

The arrow in Figure above shows that the reaction goes from left to right, from hydrogen and oxygen to water. The reaction can also go in the reverse direction. If an electric current passes through water, water molecules break down into molecules of hydrogen and oxygen. This reaction would be represented by a right-to-left arrow in Figure above .


Q: If an electric current passes through water, water molecules break down into molecules of what?


A:
hydrogen and oxygen