What are the three main plate boundaries and what do they do?

First of all, it is important to recognise that we have three main plate boundaries which can control tectonic movement and cause activities such as: earthquakes, tsunamis and volcanoes. The first plate boundary is the 'divergent' plate boundary where two plates are moving away from each other. The second, is the 'constructive' plate boundary where the two plates move away from each other. The final plate boundary is called the 'conservative' boundary where the plates slide past each other in the same direction but at different speeds.