Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer:...
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Transcript of Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer:...
![Page 1: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/1.jpg)
Do Now:
• Are volcanoes a destructive or constructive force on the Earth? Explain your answer.
• Answer: Both, Volcanoes are considered destructive as well as constructive because they build up new landforms and destroy existing structures.
![Page 2: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/2.jpg)
7-4 Volcanic Landforms
1) What landforms are created by lava and ash?
2) What are the types of volcanoes?
3) What are some positive aspects of volcanoes?
![Page 3: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/3.jpg)
Landforms from Lava and Ash
![Page 4: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/4.jpg)
Shield Volcanoes
• Shield volcanoes form from the repeated eruption of lava (usually pahoehoe).
• Shield volcanoes tend to be shorter and wider than other types of volcanoes.
![Page 5: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/5.jpg)
Cinder Cone Volcanoes
• Cinder cone volcanoes form from eruptions of high viscosity lava (Aa).
• Cinder cone volcanoes are composed of ash, cinders, and bombs.
• These volcanoes tend to be tall with steep sides.
![Page 6: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/6.jpg)
Composite Volcanoes
• Composite volcanoes form when eruptions alternate between eruptions of ash and lava. (Quiet and Explosive eruptions)
• Composite volcanoes are tall and cone shaped.
![Page 7: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/7.jpg)
Lava Plateaus
• Lava plateaus form from thin runny lava (pahoehoe) erupting from long cracks in the ground.
• Repeated eruptions forms a high flat landform called a Lava Plateau.
![Page 8: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/8.jpg)
Volcanic Neck
• Volcanic necks form when magma hardens in the volcano’s pipe and the rest of the volcano is eroded away.
![Page 9: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/9.jpg)
Volcanic Neck
![Page 10: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/10.jpg)
Landforms from Magma
![Page 11: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/11.jpg)
Sills and Dikes
• Magma that forces its way across rock layers hardens into a dike
• Magma that squeezes between horizontal layers of rock forms a sill
![Page 12: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/12.jpg)
Batholiths
![Page 13: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/13.jpg)
Batholith
• A batholith is a mass of rock formed when a large amount of magma cools beneath the surface.
![Page 14: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/14.jpg)
Dome Mountains
• When a batholith is pushed up to the surface it can form dome mountains.
![Page 15: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/15.jpg)
Are there positive aspects of Volcanoes?
![Page 16: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/16.jpg)
Positive aspects of Volcanoes
• Hot Springs• Geysers• Fertile Soil • Lava breaks down into
mineral rich soil• Geothermal Energy
is used to produce electricity and to heat homes.
![Page 17: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/17.jpg)
Geothermal Energy
![Page 18: Do Now: Are volcanoes a destructive or constructive force on the Earth? Explain your answer. Answer: Both, Volcanoes are considered destructive as well.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649d355503460f94a0c8de/html5/thumbnails/18.jpg)
Geothermal Heating