1. Volcanoes are Extinct, Dormant or Active
   1. Extinct volcanoes will never erupt again
   2. Dormant volcanoes are those which havn't erupted for 2000 years
      1. it could erupt again though
   3. Active volcanoes have erupted recently and are likely to erupt again
2. Dome Volcano
   1. Formed when lava is acidic (thicker)
   2. lava flows slowly and hardens quickly forming steep sided features
   3. Topic
3. Composite volcano
   1. Four things can be ejected
      1. Ash
      2. Gas
      3. Volcanic Bombs
      4. Molten Rock
         1. Lava when above surface, magma when below
   2. Once this has been ejected it forms the volcano from a mixture of lava and ash
   3. Topic
4. Shield volcano
   1. Formed when the lava is basic (alkali)
   2. It is runny and takes longer to cool
   3. Flows easily, spreads to form wide flat surfaces
   4. Topic