Volcano is a mountain like structure that is disclosed downwards to pool of molten rock beneath the surface of the earth and whenever pressure builds up the eruption occurs.
Explanation:
The Earth is made up of many layers such as Crust, Mantle, Outer core and Inner core.
The Crust is made up of 95% igneous and metamorphic rocks, 4% shale, 0.75% sandstone and 0.25% limestone.
The Mantle makes up about 85% of Earth's weight. It is made of Silicate Rocks
The Outer core is very hot, made up of hot liquid Nickel and Iron.
it created magnetic field and makes a blockade around the earth.
The Inner core is made of solid Nickel and Iron ,it has a temperature between 4,982 deg and 7.204 deg C
Tectonic Plates are around 62 miles thick, they float very slowly on top of liquid mantle.
There are several gases inside the earth as well as of hot melted myths.This melted hot material is called magma.
The magma comes out of the earth during a volcanic eruption
The red liquid that comes out is called blob. what is inside the earth is called its magma. when it comes out it is called lava.
Lava on the surface stops flowing and hardens the rocks.
<h2>Types of volcano</h2>
Active volcano - in this eruption can be anytime and often
eg: Mount Vesuvius, Italy and Sakurajima, Japan
Dormant Volcano - it is an active volcano that is not erupting, but supposed to erupt again
eg: Mauna Kea, Hawaii and Mount Fuji, Japan
Extinct volcano - it means it hasn't erupted for a very long time , so will probably won't ever erupt again.
eg: Deccan Traps, India and Mount Kilimanjaro, Tanzania
Volcanoes are classified based on shape:
Shield volcanoes - these are like a shield or a bowl in the middle with a long gentle slopes made by lava flows in this type the magma is too runny so the gas moves away easily and magma simply comes out of the mountain and flows down the sides
eg: Mount Etna and Hawaii
Composite volcanoes - these are steep- sided volcanoes and composed of many layers of volcanic rocks that are usually made from the thick sticky lava, rock debris and ash
Magma is thick and gluey so gas cannot escape and it builds up and up until it explodes sending out huge clouds of burning rock and gas.
eg: Mount cotopaxi, Ecuador and Mount Fuji, Japan
Cinder cone volcano - these are ovular or circular cones made from erupting lava that breaks into small pieces when it shoots into the air.
these small pieces fall back to the land, they cool and creates cinders around the vent.
eg: Paricutin, Mexico and the Mauna Kea,HawaiI
Volcano lava Dome
these are built by viscous magma, being flared up effusively onto shallow and then stacking up around the vent.
eg: Katla, Iceland and Lassen peak, United States
