Movie: What does this tell you about our "restless planet"? Why do you think it is called a "restless Earth"?

The movie tells me that our planet, the Earth, is constantly changing since the creation of itself. This tells us that our "restless planet" has been changing in many different ways, and volcano is one of the most important factors when the Earth was created since the volcano's source of heat is actually from the Earth's core. It has changed from just a collision of several rocks in space to a huge planet with wonderful places scattered all over the place. I think it is called a "restless Earth" because it has changed in so many various different ways throughout the whole history of Earth.