What are three factors that affect the violence of a volcanic eruption?, homework help

Questions to Answer:

1. What are three factors that affect the violence of a volcanic eruption?
2. What three types of materials are associated with volcanic eruptions
3. List and define each of the three major types of volcanoes and give one example of each.
4. Define the following terms: dike, sill, laccolith, batholith and stock.
5. At what two types of plate boundaries can volcanoes be found?