Tectonic Plates Do Not Move Because of Volcanism
Tectonic plates do not move because of volcanic activity. It's actually quite the opposite, volcanoes are more active because of tectonic activity. Tectonic plates operate on fault lines, volcanic activity follows.
There is No 'Dark Side of the Moon'
Yes, there is a side of the moon that we don't see every day. But, the moon orbits and rotates on an axis just like the Earth. So, you will be able to see every side of the moon throughout the course of one year.