chapter 7: lesson 3
DESCRIPTION
Chapter 7: Lesson 3. VOLCANOES. Pages D30 and D31. How do Volcanoes Form?. What is a Volcano?. A place where molten rock, hot gases, and solid rock erupt It is an opening in the crust. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Chapter 7: Lesson 3](https://reader035.vdocuments.net/reader035/viewer/2022062310/56816265550346895dd2cae9/html5/thumbnails/1.jpg)
Chapter 7: Lesson 3
VOLCANOES
![Page 2: Chapter 7: Lesson 3](https://reader035.vdocuments.net/reader035/viewer/2022062310/56816265550346895dd2cae9/html5/thumbnails/2.jpg)
HOW DO VOLCANOES FORM?Pages D30 and D31
![Page 3: Chapter 7: Lesson 3](https://reader035.vdocuments.net/reader035/viewer/2022062310/56816265550346895dd2cae9/html5/thumbnails/3.jpg)
What is a Volcano?
• A place where molten rock, hot gases, and solid rock erupt
• It is an opening in the crust
![Page 4: Chapter 7: Lesson 3](https://reader035.vdocuments.net/reader035/viewer/2022062310/56816265550346895dd2cae9/html5/thumbnails/4.jpg)
![Page 5: Chapter 7: Lesson 3](https://reader035.vdocuments.net/reader035/viewer/2022062310/56816265550346895dd2cae9/html5/thumbnails/5.jpg)
• Vent: central opening in a volcanic area through which magma may escape
• Lava: magma that comes out of the vent–Erupted material cools and hardens
around the vent. This is a volcano!
![Page 6: Chapter 7: Lesson 3](https://reader035.vdocuments.net/reader035/viewer/2022062310/56816265550346895dd2cae9/html5/thumbnails/6.jpg)
• Crater: a cup-like hollow that forms at the top of a volcano and around the vent.
![Page 7: Chapter 7: Lesson 3](https://reader035.vdocuments.net/reader035/viewer/2022062310/56816265550346895dd2cae9/html5/thumbnails/7.jpg)
Volcano collapses and causes a larger crater
CALDERA
![Page 8: Chapter 7: Lesson 3](https://reader035.vdocuments.net/reader035/viewer/2022062310/56816265550346895dd2cae9/html5/thumbnails/8.jpg)
![Page 9: Chapter 7: Lesson 3](https://reader035.vdocuments.net/reader035/viewer/2022062310/56816265550346895dd2cae9/html5/thumbnails/9.jpg)
Volcanoes occur in belts, or long lines...
• Pacific Ring of Fire–Circles the Pacific Ocean
![Page 10: Chapter 7: Lesson 3](https://reader035.vdocuments.net/reader035/viewer/2022062310/56816265550346895dd2cae9/html5/thumbnails/10.jpg)
• Another is located around the Mediterranean Sea through Iran and continues through Indonesia to the Pacific
![Page 11: Chapter 7: Lesson 3](https://reader035.vdocuments.net/reader035/viewer/2022062310/56816265550346895dd2cae9/html5/thumbnails/11.jpg)
• 80% of land volcanoes are found on these two belts
• On the ocean floor, volcanoes line the mid-ocean ridges.
• Volcanoes form around boundaries
![Page 12: Chapter 7: Lesson 3](https://reader035.vdocuments.net/reader035/viewer/2022062310/56816265550346895dd2cae9/html5/thumbnails/12.jpg)
• Rift volcanoes: Form at divergent boundaries
![Page 13: Chapter 7: Lesson 3](https://reader035.vdocuments.net/reader035/viewer/2022062310/56816265550346895dd2cae9/html5/thumbnails/13.jpg)
• Hot Spot: a hot part of the mantle. Magma melts up through the crust. Middle of the plate is moving over a hot spots
Hawaiian Islands
![Page 14: Chapter 7: Lesson 3](https://reader035.vdocuments.net/reader035/viewer/2022062310/56816265550346895dd2cae9/html5/thumbnails/14.jpg)
![Page 15: Chapter 7: Lesson 3](https://reader035.vdocuments.net/reader035/viewer/2022062310/56816265550346895dd2cae9/html5/thumbnails/15.jpg)