What is it?
Have you ever wondered how a volcano forms? Were does it come from? Volcanoes may seem like very difficult items to learn about, but they really aren't. Volcanoes are pretty much a mountain that opens downward to a pool of molten rock at the center of the earth. While most volcanoes form near tectonic plates, others would form near hot rocks inside the earth. These rocks are known as mantle plumes, which are found mostly around the Hawaiian area. Something really amazing though, about volcanoes is that they are formed when magma, found within the earths upper mantle, works it's way to the surface. When it reaches the surface , it erupts to form lava flows and ash deposits. Over the time the volcano erupts, it will grow bigger and bigger.
Some scientist have categorized volcanoes into three main categories: active, dormant, and extinct. These labels help to show the timeline of the volcanoes, and to keep track of the more dangerous ones. An Active volcano is one which has recently erupted and has a possibility that it may erupt again. An dormant volcano is one which has not erupted in a long time, but still has a slight chance of erupting in the future. Lastly, an extinct volcano is one that has not erupted in a thousand years and pretty much has no chance of eruption.
A typical volcano has many parts to it. The most important is most likely the cone to the volcano. This is made up of the many materials from the past eruptions. Another super important part is the magma. The magma is located under the volcano in a chamber which contains molten rock. [ Molten rock is called magma when it is under the volcano, and lava when it is above the volcano.] When the magma rises, it goes through an central tube called a conduit, then heading to the opening surface called a vent. Magma may also emerge from the side vents. Lastly. the typical bowl-shaped depression at the top of the volcano is called a crater.
Did you know that the word volcano is originally from the Roman god of Fire, Vulcan? Isn't that so cool!
Did you know that lava is one of the most hottest liquids in the world? That is super scary!
How does it Erupt?
The first stage of an eruption is steam eruption. Volcano eruptions often begin with a series of steam or pheatic explosions caused by an interaction of magma and groundwater. As the magma rises toward the surface, it heats downward to its boiling temperature and triggers the " flashing " of water to steam. This can cause shattering rocks, hurl large blocks and volcanic ash thousands of feet in the air. It can also excavate a crater into the ground.
The second stage of an eruption is the magma eruption. When the rich gas, rhyolitic magma, reaches the surface of the volcano, it starts some strong, violent explosive eruptions. The explosive activity usually blasts apart the magma into tiny, little fragments called tephra, which may rise to over 10 km above the vent. The tephra may drift tens to thousands kilometers down. The tephra can cause little to no damage to any life or property. Though, the fine ash can seriously disrupt social and economic activities for weeks and months.
The last stage of eruption of the volcano is the Lava flows. This is an non - explosive eruption of vicious magma to form one or more mound - shaped lava domes. Evidence from scientist have shown that magma usually erupts quietly because it is released during its upward journey instead of being trapped. This can change if the volcano is much bigger or smaller, but it usually stays the same.
Are Underwater and Land Volcanoes the same?
Even though it seems like Land and Under Water volcanoes are extremely different, they have a lot of the same critiques. For starters, one similarity is that both volcanoes form a like one another. It starts out when the tectonic plates crash into each other and then it goes on. Some other similarity's is that the scientist have both categorized the volcanoes into four different headings. [ Cinder Cones, Composite Volcanoes, Shield Volcanoes and Lava Volcanoes ] Finally, the last similarity is that both Volcanoes are super dangerous. Even though they are beautiful to watch, you don't want to be to close.
How are The Ring of Fire and Volcanoes related?
Can they be Prevented?
Mount Katmai is an half underwater and half land volcano. Thats pretty awesome!
Mount is an dormant volcano located in the heart of the National park in Washington.
Mount Saint Helens
Mount Saint Helens is one of the worlds most famous volcano because of how big its eruption was. It was humongous!