Environmental management: Volcanoes and volcanic activity

Use the information from this website and answer the questions:
http://www.bbc.co.uk/schools/gcsebitesize/geography/natural_hazards/volcanoes_rev1.shtml

1. What is meant by intrusive volcanic activity?
2. Approximately how many active volcanoes are there across the world? Where are almost 50 per cent of them found?
3. Volcanoes are not formed at every type of plate boundary. At which types are they mainly found? Why?
4. Describe the three main types of volcanoes, explaining why they are different shapes
5.List the range of different materials which may be released during a volcanic eruption.
5. For a named volcanic eruption you have studied, describe the short and long-term effects of the eruption

Volcanic activity in Iceland: Case study
http://www.bbc.com/news/science-environment-28943708