1 / 15

What Causes Volcanoes? 11/13/13

What Causes Volcanoes? 11/13/13. 9-3 pgs. 230-235 IN: What causes volcanoes?. Inside a Volcano. Formation of Magma. Solid rock may become magma when: pressure is released, when the temperature rises above its melting point, or when it composition changes.

kirra
Download Presentation

What Causes Volcanoes? 11/13/13

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. What Causes Volcanoes? 11/13/13 • 9-3 pgs. 230-235 IN: What causes volcanoes?

  2. Inside a Volcano

  3. Formation of Magma • Solid rock may become magma when: • pressure is released, • when the temperature rises above its melting point, • or when it composition changes.

  4. Where do volcanoes form? Near tectonic plate boundaries.

  5. Where do volcanoes form? • When tectonic plates separate. +Rift – deep crack between plates

  6. http://www.wwnorton.com/college/geo/egeo/flash/2_11.swf

  7. Where do volcanoes form? • When tectonic plates collide. +Subduction Zones

  8. http://www.wwnorton.com/college/geo/egeo/flash/2_9.swf

  9. Where do volcanoes form? • Hot Spots – places on the Earth’s surface that are directly above columns of rising magma, called mantle plumes.

  10. Hawaii

  11. http://www.wwnorton.com/college/geo/egeo/flash/2_10.swf

  12. Predicting Volcanic Eruptions • Measuring Small Quakes • Measuring Slope • Measuring Volcanic Gases • Measuring Temperature

  13. Classifying Volcanoes • Extinct – will never erupt • Dormant – may erupt • Active – are erupting

  14. OUT: Why are most volcanoes on tectonic plate boundaries?

More Related