How volcano is formed PPT?

How volcano is formed PPT?

The explosive eruptions come from the trapped gases and produce cinders and ash. Eruptions from cinder cone volcanoes are violent and explosive because of all the gas trapped in the magma. • The large amounts of hot ash and lava thrown out of the vent fall to the ground forming the cone shape that these volcanoes have.

How do volcanoes change the earth’s surface PPT?

Volcanoes can change the Earth’s surface. When magma (melted rock) erupts from the volcano the top of the mountain can be changed, either built up or exploded off. The lava and ash can destroy forests and bury fields. Magma is melted rock beneath the Earth’s surface.

What are the 3 types of volcanoes?

There are three types of volcanoes: cinder cones (also called spatter cones), composite volcanoes (also called stratovolcanoes), and shield volcanoes. Figure 11.22 illustrates the size and shape differences amongst these volcanoes. Shield volcanoes, which get their name from their broad rounded shape, are the largest.

What are the 5 types of volcanic eruption?

Volcanic eruptions may fall into six major types: Icelandic, Hawaiian, Strombolian, Vulcanian, Pelean, and Plinian.

What are the 7 types of volcano?

What are the Different Types of Volcanoes?

• Cinder Cone Volcanoes: These are the simplest type of volcano.
• Composite Volcanoes: Composite volcanoes, or stratovolcanoes make up some of the world’s most memorable mountains: Mount Rainier, Mount Fuji, and Mount Cotopaxi, for example.
• Shield Volcanoes:
• Lava Domes:

What is the most dangerous type of eruption?

Plinian Eruption The largest and most violent of all the types of volcanic eruptions are Plinian eruptions. They are caused by the fragmentation of gassy magma, and are usually associated with very viscous magmas (dacite and rhyolite).

Which volcano will destroy the world?

Yellowstone supervolcano

What are the 3 most dangerous volcanoes?

The World’s Most Dangerous Volcanoes

• Mount St. Helens, Washington.
• Mount Kilauea, Hawaii. The world’s most active volcanic mass, Kilauea is home to many frequent eruptions.
• Mayon Volcano, The Philippines.
• Redoubt Volcano, Alaska.
• Mount Pinatubo, The Philippines.
• Mount Agung, Bali.
• Mount Fuji, Japan.
• Popocatépetl, Mexico.

What is the most dangerous type of volcano and why?

Composite volcanoes are some of the most dangerous volcanoes on the planet. The viscous lava cannot travel far down the sides of the volcano before it solidifies, which creates the steep slopes of a composite volcano. Viscosity also causes some eruptions to explode as ash and small rocks.

What is the scariest volcano?

Deadliest Eruption

Deaths	Volcano	When
92,000	Tambora, Indonesia	1815
36,417	Krakatau, Indonesia	1883
29,025	Mt. Pelee, Martinique	1902
25,000	Ruiz, Colombia	1985

What is the most powerful volcano on Earth?

The explosion of Mount Tambora is the largest ever recorded by humans, ranking a 7 (or “super-colossal”) on the Volcanic Explosivity Index, the second-highest rating in the index.

What is the most powerful volcano?

Rising gradually to more than 4 km (2.5 mi) above sea level, Hawaii’s Mauna Loa is the largest active volcano on our planet. Its submarine flanks descend to the sea floor an additional 5 km (3 mi), and the sea floor in turn is depressed by Mauna Loa’s great mass another 8 km (5 mi).

What are the 3 most active volcanoes in the world?

The World’s Five Most Active Volcanoes

• Intro. (Image credit: Jesse Allen)
• Sangay, Ecuador – 94 years. (Image credit: Ecuador Ministry of Tourism)
• Santa María, Guatemala – 101 years. (Image credit: dreamstime)
• Stromboli, Italy – 108 years.
• Mount Etna, Italy – 109 years.
• Mount Yasur, Vanautu – 111 years.

What are the 5 most active volcanoes?

Let’s take a look at the world’s most active volcanoes and where these volcanoes are located.

• Mauna Loa – Hawaii. Source: R.W. Decker/Wikimedia Commons.
• Eyjafjallajokull – Iceland.
• Mount Vesuvius – Italy.
• Mount Nyiragongo – Congo.
• Taal Volcano – Philippines.
• Mount Merapi – Indonesia.
• Galeras – Colombia.
• Sakurajima – Japan.

What is the biggest volcano ever?

Mauna Loa

What is the most dangerous volcano in the world today?

A recent PBS documentary identified Kilauea, on the island of Hawaii, as “The Most Dangerous Volcano in the World.” A curious choice, in my opinion, for any rating of a volcano’s danger must take into account both the intrinsic hazard and the number of lives at risk. Eruptions of Kilauea are certainly spectacular.

What was the worst volcano in history?

The 5 deadliest volcanoes in history

• Tambora, Indonesia (1815) The largest recorded volcanic eruption in history, Tambora caused enough starvation and disease to kill approximately 80,000 people.
• Krakatau, Indonesia (1883)
• Pelée, Martinique (1902)
• Ruiz, Colombia (1985)
• Unzen, Japan (1792)

What are the 10 most active volcanoes?

The world’s most active volcanoes – top 10 list

• Shiveluch, Russia (43 entries)
• Pelée, Martinique (22 entries)
• Cotopaxi, Ecuador (21 entries)
• Katla, Iceland (21 entries)
• Arenal, Costa Rica (19 entries)
• Hekla, Iceland (15 entries)
• Ibusuki Volcanic Field, Japan (15 entries)

What are the 10 most active volcanoes in the Philippines?

Top 10 Active Volcanoes in the Philippines

• 1.) Mount Mayon – Albay.
• 2.) Taal Volcano – Batangas.
• 3.) Mount Kanlaon – Negros Oriental.
• 4.) Mount Bulusan – Sorsogon.
• 5.) Mount Makaturing – Lanao del Sur.
• 6. – a) Musuan Volcano – Bukidnon.
• b) Mount Ragang – Lanao del Sur.
• 7. – a) Didicas Volcano – Cagayan.

What are the 5 most active volcanoes in the Philippines?

The majority of the active volcanoes are located in the island of Luzon. The six most active volcanoes are Mayon, Hibok-Hibok, Pinatubo, Taal, Kanlaon and Bulusan.