Catastrophe

In this unit, we'll be looking at how Volcanic eruptions happen, and how they can be dangerous.  Answer the following questions in your books using the links to help you -

1. What is the difference between lava and magma? - http://www.universetoday.com/27908/what-is-the-difference-between-lava-and-magma/
2. How can erupting volcanoes be dangerous? - http://www.universetoday.com/29667/volcano-dangers/
3. Complete the activity on this link - http://dsc.discovery.com/convergence/krakatoa/interactive/interactive.html.  What is a caldera?
4. What other problems did the eruption of Mt. Krakatoa cause?
5. What does a seismogrpah do? - http://www.thetech.org/exhibits_events/online/quakes/seismo/
6. Where do you find the Earth's crust, and how thick is it? - http://www.wisegeek.com/what-is-the-earths-crust.htm

try these once you're finished - http://dsc.discovery.com/convergence/krakatoa/puzzles/puzzles.html , http://www.stopdisastersgame.org/en/playgame.html