1. Volcanic Eruptions 11/4/15 9-1/9-2 pgs. 222-229  IN: What is a volcano? Put your Vocab Sheet on the books

2. Volcano  A mountain that forms when molten rock, called magma, is forced to the Earth’s surface.

3. Inside a Volcano

4. Volcanic Eruptions  Two kinds:  Nonexplosive  Explosive

5. Nonexplosive Volcano  Lava flows come from nonexplosive eruption.

6. What is difference between lava and magma? Magma is inside the Earth. Lava is on the Earth’s Surface.

7. Explosive Volcano  Clouds of hot debris and gases shoot out from the volcano often at supersonic speeds.

8. Pyroclastic Material  Rock fragments created by explosive volcanic eruptions.

9. 3 Types of Volcanoes  Shield volcanoes  Cinder cone volcanoes  Composite volcanoes

10. Shield Volcanoes  Built out of layers of lava from repeated nonexplosive eruptions.

11. Hawaiian Islands

12. Cinder Cone Volcanoes  Small volcanic cones made entirely of pyroclastic material (explosive).

13. Sunset Crater – Flagstaff, AZ

14. Composite Stratovolcanoes  Form by explosive eruptions of pyroclastic material followed by quieter outpourings of lava.  Most common.

15. Mt. Fuji - Japan

16. Mt. St. Helens – Washington State

19.  OUT: Is a nonexplosive volcanic eruption more likely to produce lava or pyroclastic material? Explain. Glue in the diagram

20. Composite Volcano Shield Volcano Cinder Cone Volcano