1. Volcanoes

2. What do you know about volcanoes? What would you like to know?

3. Hawaii

4. Volcanoes can be Active, Dormant or Extinct Active Dormant Extinct

5. vent cone magma chamber Pipe (Conduit)

6. Cold Crust Ocean Hot Melt Hot Mantle Cooler Mantle

8. Volcanoes that erupt like yours are called Effusive or Shield volcanoes The lava: Is runny The lava flows a long way Has some bubbles Forms volcanoes that are wider than they are tall An example is: Mauna Loa, Hawaii Effusive volcanoes

9. Explosive Volcanoes We are now going to show you what an explosive volcano is like. Watch carefully and you will notice some differences in the way it erupts from the way your volcano erupted.

10. USGS/Hawaiian Volcano Observatory Photo by J.D. Griggs

11. Activity

12. magma

13. Hawaii

14. Courtesy of www.swisseduc.ch Ash and rocks are thrown into the air Thick lava flows

15. Rough Lots of pieces Smooth or Ropy Courtesy of A. Rust

16. We have brought along a collection of real volcanic rock from Bristol University for you to investigate Look carefully- Can you see any bubbles in the rock? Can you find any crystals? Can you see anything that has melted in the lava? Can you find a volcanic bomb? Can you find some wiggly lava? We have brought along a few rocks that are not from Volcanoes- can you work out which ones they are?

17. What is a volcano? Mountains that erupt. A dormant volcano is:awake asleep ________ chamber V____ Conduit Cone Why do volcanoes erupt? Hot magma wants to go: up down How do volcanoes erupt? Two types: e and effusive What helps make explosive volcanoes erupt?. Do effusive volcanoes have runny or sticky lava?. l a v a x p l o s i v e b u b b l e s r u n n y e n t M a g m a