when two air masses coming together the boundary between the two is called a weather front
That's because they wanted peace. It was the policy of appeasement. If they gave him what he wanted, that would solve his problems and keep the peace in Europe intact. They were however as it was only a matter of time before the war began, and it did with the invasion of Poland.
The energy stored in rocks as a result of plate movement can be released in an earthquake.
