What is a volcano PPT?

What is volcano Slideshare?

A volcano is a mountain that opens downward to a pool of molten rock below the surface of the earth. When pressure builds up, eruptions occur. Gases and rock shoot up through the opening and spill over or fill the air with lava fragments.

What is volcano explain?

Volcanoes are openings, or vents where lava, tephra (small rocks), and steam erupt on to the Earth’s surface.

What is volcano and its types?

Volcanoes are grouped into four types: Cinder cones. Composite volcanoes. Shield volcanoes. Lava volcanoes.

What is a volcano Twinkl?

Volcanoes are types of mountains made from rock and ash. It has an opening on the top that opens downwards to a pool of molten lava. Magma builds up underneath the surface of the Earth and the pressure builds until it escapes by shooting up through the volcano, and erupts.

What are volcanoes Class 7?

A volcano is a vent from which a combination of melted rock, solid rock debris and gas erupts. It has a reservoir of molten material below the surface (magma chamber) called magma, and when this magma rises to the surface, it is called lava.

What is the parts of a volcano?

The three main parts of a volcano are the chamber, the vent, and the crater.

What are the 5 main parts of a volcano?

The main parts of a volcano include the magma chamber, conduits, vents, craters and slopes.

What are the 3 main parts of a volcano?

erupting volcano The main parts of a volcano are 1) the crater, a depression at the top of the volcano from which volcanic material has been ejected; 2) the vent, the conduit between crater and the magma; and 3) the cone, the area around the crater at the top of the volcano, made up of material ejected during an …

What is volcano base?

Base surges are ground hugging, fast outward moving and turbulent, dilute clouds of gas and ash. They result from water magma interactions (violent steam explosions). During the 1965 eruption of Taal volcano (Philippines), such base surges were first observed. Some of them traveled 4 km and killed 189 people.

What is volcano explain with diagram?

A volcano is an opening in the surface of the Earth from which hot magma flows out. The following are the structural features of a volcano: Vent: It is an opening from which hot magma flow out to the surface of the Earth. It is a circular pipe like structure.

How volcanoes look is called?

A volcanic cone is the hill-shaped landform that forms around a volcano. Volcanic cones can be steep or gently sloping depending on the type of eruption that form them. 56.

How is volcano formed?

A volcano is formed when hot molten rock, ash and gases escape from an opening in the Earth’s surface. The molten rock and ash solidify as they cool, forming the distinctive volcano shape shown here. As a volcano erupts, it spills lava that flows downslope.

Why does a volcano occur?

Volcanoes erupt when molten rock called magma rises to the surface. Magma is formed when the earth’s mantle melts. Melting may happen where tectonic plates are pulling apart or where one plate is pushed down under another. Magma is lighter than rock so rises towards the Earth’s surface.

Where are the volcanoes?

Sixty percent of all active volcanoes occur at the boundaries between tectonic plates. Most volcanoes are found along a belt, called the “Ring of Fire” that encircles the Pacific Ocean. Some volcanoes, like those that form the Hawaiian Islands, occur in the interior of plates at areas called “hot spots.”

What is volcano for kids?

A volcano is a mountain or hill with an opening. When a volcano erupts, magma is pushed up through the opening with great force. When magma reaches the Earth’s surface, it is called lava. Lava can be as hot as 2,200°F (1,204°C). Some volcanic eruptions are explosive.

What are 5 interesting facts about volcanoes?

Top 10 Facts About Volcanoes

• Volcanoes are openings of the Earth’s surface. …
• The word volcano comes from the word ‘vulcan’. …
• Volcanoes can be active, dormant or extinct. …
• The liquid inside the volcano is called magma. …
• Lava is the liquid that is expelled from the volcano. …
• Lava is very, very hot!

Why are volcanoes important?

Volcanic materials ultimately break down and weather to form some of the most fertile soils on Earth, cultivation of which has produced abundant food and fostered civilizations. The internal heat associated with young volcanic systems has been harnessed to produce geothermal energy.

What are the characteristics of volcanoes?

Characteristics of volcanoes

• A volcano is formed by eruptions of lava and ash.
• Volcanoes are usually cone shaped mountains or hills.
• When magma reaches the Earth’s surface it is called lava. …
• Volcanic eruptions can happen at destructive and constructive boundaries , but not at conservative boundaries or collision zones .

What is a volcano name?

Classic examples include Mount Fuji in Japan, Mayon Volcano in the Philippines, and Mount Vesuvius and Stromboli in Italy.

Are volcanoes male or female?

In psychological terms, both genders are represented within a volcano: a mountain that ejects materials may represent a phallis while a caldera may represent a womb, the cradle of the generative force.

Which country have a volcano?

Which countries have the most volcanoes?