Questions -
1. Volcanoes are not necessarily all violent. What are the three types of eruptions and what is the main factor that determines which type will occur?
2. When a violent eruption does occur, what is it that causes pressure to build up in a volcano? (What gases are trapped and what characteristic of the magma causes them to be trapped)
3. What characteristic results in a fluid magma that is ejected in a series of quiet, non-violent eruptions?
4. Would the magma that forms a volcano with a broad gently sloping sides have high or low silica content?
5. What does the presence of high water content in fluid lava result in?