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The Earth has volcanoes because it is hot inside. In some places it is hot enough to turn solid rock into liquid rock. Geologists call the liquid rock magma. The magma rises towards the surface because it is less dense than the surrounding rock (like a hot air balloon rising through the cooler air). If the magma reaches the surface it is called lava and lava accumulates to make a volcano. Volcanoes grow by intrusion and extrusion. An intrusion is magma that moves up into a volcano and then it stops, never erupting. This way the volcano grows on the inside. An extrusion is an eruption. It can add layers of lava or ash. This way the volcano grows on the outside. Volcanoes erupt because of density and pressure. The lower density of the magma causes it to rise (like air bubbles in syrup). It will rise to the surface or to a depth that is determined by the density of the magma and the weight of the rocks above it. As the magma rises, bubbles start to form from the gas dissolved in the magma. The gas bubbles exert tremendous pressure. This pressure helps to bring the magma to the surface and forces it in the air, sometimes to great heights.
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What is a strato-volcano made from?
A strato-volcano, also known as a composite volcano, is made from alternating layers of solidified lava flows, volcanic ash, and other volcanic debris. These layers are built up over time as the volcano continues to erupt, creating the classic cone shape associated with strato-volcanoes.
What is the force that causes volcano to erupt?
Pressure.
What type of volcano is cotopixi?
Mount Cotopaxi is a Composite or Strato volcano.
Why is another name for composite volcano Strato?
A composite volcano is called a "strato" volcano because of its alternating layers of lava flow and volcanic ash, which can resemble the stratified layers of sedimentary rock ("strato" means layers in Latin). This type of volcano is characterized by its steep-sided profile and explosive eruptions.
What is a volcano that does not erupt called?
It can be called an active, dormant or extinct volcano. An active volcano erupts regularly and frequently, however, it might not erupt at some times. A dormant volcano rarely erupts. Therefore, it does not erupt for most of the time. An extinct volcano does not erupt anymore.
What is a strato-volcano made from?
A strato-volcano, also known as a composite volcano, is made from alternating layers of solidified lava flows, volcanic ash, and other volcanic debris. These layers are built up over time as the volcano continues to erupt, creating the classic cone shape associated with strato-volcanoes.
What are strato volcanoes?
Is a strato volcano active?
What causes a cinder cone volcano to erupt?
you
What is the force that causes volcano to erupt?
Pressure.
What caused the iceland volcano to erupt?
What usually causes a volcano to erupt like Eyjafjallajokull is a slight disturbance in the ground.
Is mount Unzen a shield volcano or an strato volcano?
Mt. Unzen is a composite volcano, also known as a strato volcano.
Is the Acatango volcano a strato volcano?
NO
What causes the destruction of the corals?
It cause by the volcano erupt
What type of volcano is Mount Unzen?
Mount Unzen is a Composite or Strato Volcano (same thing but Strato is a nickname for composite)! Sometimes it is calles a Complex Strato Volcano
What causes pompii volcano eruped?
Godzilla swims around and causes it to erupt.
What kind of volcano is the veniaminof volcano?
A Strato volcano or a composite volcano.
What kind of volcano is Mt Krakatoa?
It is a Strato Volcano.
