We reviewed the different boundary types and then looked at how earthquakes are found along these boundaries. We learned that earthquakes give off two types of seismic waves. We then learned that the strength of the earthquake is given on the Richter Scale. We then started to write down what all the parts to a volcano are.
Here is the whole documentary on the British Airlines plane that flew through volcanic ash.
Why the engines were able to restart because of the engine cooling off.