Covalent Bonding Experiment - Day 2

Yesterday I posted the beginning of our project separating hydrogen and oxygen in water with a 9v battery. Here's what we've got today:

 See the gas bubble in the top of the test tube? That wasn't there yesterday, and the tube was completely submerged under the water. So, no outside air could get into it. That's hydrogen gas!

We know it isn't oxygen collecting in the tube because the oxygen is reacting with (oxidizing) the copper wires and turning it blue at the bottom of the jar:

Note: This project is set up somewhat differently from the project described at middleschoolchemistry.com. We used 2 test tubes under water in order to collect the gas (rather than just watching the gas bubble in the jar). The wires go directly into the tubes under the water. We held the tubes close together with a rubber binder so that the electricity would flow between them better.