the parts of a volcano. what is a volcano? a mountain that forms when magma reaches the surface of...
TRANSCRIPT
![Page 1: The Parts of a Volcano. What is a Volcano? A mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649dd35503460f94acac6a/html5/thumbnails/1.jpg)
The Parts of a Volcano
![Page 2: The Parts of a Volcano. What is a Volcano? A mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649dd35503460f94acac6a/html5/thumbnails/2.jpg)
What is a Volcano? A mountain that forms when magma reaches the surface of the Earth.
Magma rises because it is less dense than the solid rock around it.
![Page 3: The Parts of a Volcano. What is a Volcano? A mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649dd35503460f94acac6a/html5/thumbnails/3.jpg)
What are the parts of a Volcano?
1.VENT- an opening from which lava flows. Dust, ash, and rock particles can also be thrown out of the vent!
![Page 4: The Parts of a Volcano. What is a Volcano? A mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649dd35503460f94acac6a/html5/thumbnails/4.jpg)
2. Crater- the top of the volcano. It is a funnel shaped pit. It is formed when the material explodes out of the vent!
![Page 5: The Parts of a Volcano. What is a Volcano? A mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649dd35503460f94acac6a/html5/thumbnails/5.jpg)
3. Volcanic cone- is the pile of lava, dust, ashes, and rock around the vent. It can be found in different shapes!
![Page 6: The Parts of a Volcano. What is a Volcano? A mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649dd35503460f94acac6a/html5/thumbnails/6.jpg)
Types of Volcanoes
•There are 3 types of Volcanoes:
ShieldCinder Cone Composite•They are classified by how they form.
![Page 7: The Parts of a Volcano. What is a Volcano? A mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649dd35503460f94acac6a/html5/thumbnails/7.jpg)
Shield Volcano
•Is wide and somewhat flat.
•It forms from a quiet eruption.
•Lava flows out quietly and for great distances.
•Ex: Hawaii
![Page 9: The Parts of a Volcano. What is a Volcano? A mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649dd35503460f94acac6a/html5/thumbnails/9.jpg)
Cinder Cone Volcano
Has tall, very steep sides.
Has explosive eruptions.
This eruption produces a lot of cinder and ash.
![Page 10: The Parts of a Volcano. What is a Volcano? A mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649dd35503460f94acac6a/html5/thumbnails/10.jpg)
Paricutin in Mexico
![Page 11: The Parts of a Volcano. What is a Volcano? A mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649dd35503460f94acac6a/html5/thumbnails/11.jpg)
Composite Volcano(Stratovolcano)
Form from explosive eruptions.
Produce a lot of lava and ash.
Is large, with steep sides.
![Page 12: The Parts of a Volcano. What is a Volcano? A mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649dd35503460f94acac6a/html5/thumbnails/12.jpg)
St. Augustine volcano, Alaska.
![Page 13: The Parts of a Volcano. What is a Volcano? A mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649dd35503460f94acac6a/html5/thumbnails/13.jpg)
Pyro- Clastic Flows
• -a fast-moving current of superheated gas (which can reach temperatures of about 1,000 °C (1,830 °F) and rock which reaches speeds moving away from a volcano of up to 450 mph.
![Page 15: The Parts of a Volcano. What is a Volcano? A mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649dd35503460f94acac6a/html5/thumbnails/15.jpg)
1993 Plinian eruption of Lascar volcano,
Chile
![Page 16: The Parts of a Volcano. What is a Volcano? A mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649dd35503460f94acac6a/html5/thumbnails/16.jpg)
Viscosity
• Viscosity resistance to flow– A high Viscosity means the substance is very thick, like Honey and won't flow easily.
– Water has a low viscosity; it will flow easily.
![Page 17: The Parts of a Volcano. What is a Volcano? A mountain that forms when magma reaches the surface of the Earth. Magma rises because it is less dense](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649dd35503460f94acac6a/html5/thumbnails/17.jpg)
Gas and Silica Content
• Small amounts of dissolved gas and silica= quiet eruption
• Large amounts of dissolved gas and silica = explosive eruption.