What is a volcano? Volcanoes are
openings, or vents where lava, tephra (small rocks), and steam erupt on to the Earth's surface
. Many mountains form by folding, faulting, uplift, and erosion of the Earth's crust. Volcanic terrain, however, is built by the slow accumulation of erupted lava.
What is volcano explain with example?
Volcano – definition
When hot liquid and gaseous materials are thrown out from the mantel of the earth into the surface
, its called a volcano. During this process ash, water vapour,various types of poisonous and inflammable gases, hot molten magma are thrown out. The hot molten magma are called lava.
What is a volcano give short answer?
1:A
volcano is an opening in the earth's crust through which lava, volcanic ash, and gases escape
.An example of a volcano is Mount St. Helens in Washington state in the U.S. … Dormant → Dormant volcanoes are volcanoes that have not erupted in a long time but are expected to erupt again in the future.
What is a 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 is volcano in geography?
A volcano is
an opening in Earth's crust that allows molten rock from beneath the crust to reach the surface
. This molten rock is called magma when it is beneath the surface and lava when it erupts or flows from a volcano. … Volcanoes may also erupt in areas called hot spots where the crust is thin.
What causes volcano?
On land, volcanoes form when
one tectonic plate moves under another
. Usually a thin, heavy oceanic plate subducts, or moves under, a thicker continental plate. … When enough magma builds up in the magma chamber, it forces its way up to the surface and erupts, often causing volcanic eruptions.
What is the example of volcano?
Active → Active volcanoes erupt regularly examples of active volcanoes are
Kīlauea in Hawaii
, Mount Etna in Italy and Mount Stromboli also in Italy which has been erupting almost constantly for the last 2000 years.
What are the 7 types of volcano?
The result is the classic cone shape of composite volcanoes. A cross section of a composite volcano reveals alternating layers of rock and ash: (1) magma chamber, (2) bedrock, (3) pipe, (4) ash layers, (5) lava layers, (6) lava flow,
(7) vent, (8) lava, (9) ash cloud
.
What are the 3 types of volcano?
Individual volcanoes vary in the volcanic materials they produce, and this affects the size, shape, and structure of the volcano. There are three types of volcanoes:
cinder cones (also called spatter cones), composite volcanoes (also called stratovolcanoes), and shield volcanoes
.
What is the use of volcano?
“It gives us really fertile soils, which are great for
farming and crops
.” Volcanoes also provide a good environment for the formation of new habitats for animals, plants and insects, she said. Hot springs and geothermal energy are additional benefits.
What is the oldest volcano?
How old is the oldest volcano? The oldest volcano is probably
Etna
and that is about 350,000 years old. Most of the active volcanoes that we know about seem to be less than 100,000 years old. Volcanoes grow because lava or ash accumulates on the volcano, adding layers and height.
What are 10 facts about volcano?
- There are Three Major Kinds of Volcanoes: …
- Volcanoes Erupt Because of Escaping Magma: …
- Volcanoes can be Active, Dormant or Extinct: …
- Volcanoes can Grow Quickly: …
- There are 20 Volcanoes Erupting Right Now: …
- Volcanoes are Dangerous: …
- Supervolcanoes are Really Dangerous:
What are 5 interesting facts about volcanoes?
Here you have
some fun facts
about volcanos:
Volcanic
eruptions can send ash up to 30 kilometers into the air. The internal temperature of a
volcano
can reach 1000oC but the lava can reach up to 1200oC when it reaches the surface. There are approximately 10 to 20
volcanic
eruptions per day on Earth.
What is the name of mouth of volcano?
Crater
– Mouth of a volcano – surrounds a volcanic vent. Conduit – An underground passage magma travels through. Throat – Entrance of a volcano. The part of the conduit that ejects lava and volcanic ash.
What can you say about volcano?
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. In an eruption, gases and rock shoot up through the opening and spill over or fill the air with lava fragments. … More than 80% of the earth's surface is volcanic in origin.
What are the parts of volcano?
The main parts of a volcano include
the magma chamber, conduits, vents, craters and slopes
. There are three types of volcanoes: cinder cones, stratovolcanoes and shield volcanoes.