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Why does magma flow through upward through the crust?
Magma rises through the crust because it is less dense than the surrounding rock. As it moves upward, the magma may encounter fractures or weaknesses in the crust that allow it to continue its ascent. Additionally, the presence of heat and pressure deep within the Earth can drive magma upward towards the surface.
What do we monitor about volcanoes to predict eruptions?
In order to try to predict a volcanic eruption, scientists monitor the distribution of earthquakes near the volcano, the quantity, temperature, and composition of gas emissions, and look for deformation of the volcano itself. All of these can be used to determine if magma is moving underground, how close it is to the surface, and even how obstructed it is.
Correct order of decreasing magma viscosity?
The amount of viscosity present in magma depends on the amount of silica it has. A composite volcano produces rhyolitic lava which is very thick. A shield volcano produces a basaltic lava with less silica and significantly less viscosity.
How is the volcano different from a mountain?
Essentially a volcano is a type of mountain. Mountain are formed due to the collision of 2 continental tectonic plates. The compressing or 'converging' plates forms folds in the crust, and if little erosion has occurred to wear down these folds, they eventually continue to rise and may break to form a buildup of 'thrusts', which build on top of each other and form mountain ranges. Volcanoes typically occur due to the collision of a continental plate and an oceanic plate, where the denser oceanic plate undergoes 'subduction' and slips under the less dense continental plate. The extreme heat and pressure exerted on this subducting oceanic plate, causing uplifting of magma from the earth's mantle, which rises and breaches the surface, creating a volcano. There must be some fissure or crack in the crust in order for a volcano to form and the magma to rise through, while mountains are simply the crumpling of two landmasses. But keep in mind, that volcanoes may also later become mountains if they become completely dormant and no more lava (magma that has surfaced) is emitted.
Why don't volcanoes melt they got lava in them?
It's a matter of the energy needed. In order to melt the rock that makes it up, you have to heat it up to the melting point, and then provide additional energy to actually melt it. The amount of rock that makes up a volcano is larger than the amount of magma (underground molten rock) inside of it. The magma transfers heat into the surrounding rock and some of it can melt, but to do this, the magma itself must lose heat to do this, and the amount of energy, though large, is limited and the magma would cool and harden before it could melt a large portion of the surrounding rock. Additionally, rock is a poor conductor of heat. Rocks on the surface of the volcano will not be heated by magma hundreds to thousands of feet below. Furthermore, magma is not stored in the volcano itself, but in a magma chamber several thousand feet to several miles below it. When lava is erupted on the surface it loses heat to the air rather quickly, and cools before it can melt the surface rock.
Why do you think earthquakes are likely to occur at the same time when the volcano is about to erupt?
In order for a volcano to erupt, magma must move toward the surface. This causes rock to shift and break underground, generating earthquakes.
Why does magma flow through upward through the crust?
Magma rises through the crust because it is less dense than the surrounding rock. As it moves upward, the magma may encounter fractures or weaknesses in the crust that allow it to continue its ascent. Additionally, the presence of heat and pressure deep within the Earth can drive magma upward towards the surface.
What do we monitor about volcanoes to predict eruptions?
In order to try to predict a volcanic eruption, scientists monitor the distribution of earthquakes near the volcano, the quantity, temperature, and composition of gas emissions, and look for deformation of the volcano itself. All of these can be used to determine if magma is moving underground, how close it is to the surface, and even how obstructed it is.
Correct order of decreasing magma viscosity?
The amount of viscosity present in magma depends on the amount of silica it has. A composite volcano produces rhyolitic lava which is very thick. A shield volcano produces a basaltic lava with less silica and significantly less viscosity.
How do you complete volcano on moshi monsters?
Begin at the Volcano and follow the instructions, in order, to work your way through the Super Moshi Mission.
How is the volcano different from a mountain?
Essentially a volcano is a type of mountain. Mountain are formed due to the collision of 2 continental tectonic plates. The compressing or 'converging' plates forms folds in the crust, and if little erosion has occurred to wear down these folds, they eventually continue to rise and may break to form a buildup of 'thrusts', which build on top of each other and form mountain ranges. Volcanoes typically occur due to the collision of a continental plate and an oceanic plate, where the denser oceanic plate undergoes 'subduction' and slips under the less dense continental plate. The extreme heat and pressure exerted on this subducting oceanic plate, causing uplifting of magma from the earth's mantle, which rises and breaches the surface, creating a volcano. There must be some fissure or crack in the crust in order for a volcano to form and the magma to rise through, while mountains are simply the crumpling of two landmasses. But keep in mind, that volcanoes may also later become mountains if they become completely dormant and no more lava (magma that has surfaced) is emitted.
What prevents lava from melting a volcano?
There are a few reasons for this. First, the amount of lava on a volcano during an eruption is small compared to the volume of the volcano itself. For a large volcano the effect would be rather like puring a boucket of water on an iceberg. Second, in order to melt, the rock must first be greatly heated up as, compared to the lava, they are freezing cold. All of this heat must be lost by the lava, which cools as a result. In addtion, lava on the surface is also loosing heat to the air. Third, if you look at the temperatures, the lava is actually closer to solidifying than the rock is to melting. The largest mass of molten rock, called magma when it is underground, is usually stored in a magma chamber a few miles beneath the volcano. Some of the surrounding rock may melt and become part of the magma, but this usually does not spread too far as rock is a poor conductor of heat.
Why don't volcanoes melt they got lava in them?
It's a matter of the energy needed. In order to melt the rock that makes it up, you have to heat it up to the melting point, and then provide additional energy to actually melt it. The amount of rock that makes up a volcano is larger than the amount of magma (underground molten rock) inside of it. The magma transfers heat into the surrounding rock and some of it can melt, but to do this, the magma itself must lose heat to do this, and the amount of energy, though large, is limited and the magma would cool and harden before it could melt a large portion of the surrounding rock. Additionally, rock is a poor conductor of heat. Rocks on the surface of the volcano will not be heated by magma hundreds to thousands of feet below. Furthermore, magma is not stored in the volcano itself, but in a magma chamber several thousand feet to several miles below it. When lava is erupted on the surface it loses heat to the air rather quickly, and cools before it can melt the surface rock.
What would happen first in order for a new island to be created by volcanic eruption?
Magma must find its way toward the surface of the crust.
What list places the magma What list places the magma types in order of decreasing?
basaltic,andesitic,rhyolitic
What would any rock have to go through in order to become an igneous rock?
A rock would need to undergo melting, cooling, and solidification in order to transform into an igneous rock. This process typically happens within the Earth's crust or mantle through volcanic activity or intrusions of magma.
Can igneous rocks change directly into magma?
No, igneous rocks cannot change directly into magma. In order for igneous rocks to melt into magma, they need to be exposed to high temperatures and pressures beneath the Earth's surface, typically in the mantle or tectonic plate boundaries. Once melted, the magma can then cool and solidify to form new igneous rocks.
