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Within magma there are volatile gases, predominantly water, but also carbon dioxide, sulphur dioxide etc. At the pressures within a magma chamber these gases are protogases, usually incorporated into the mineral structure in some way i.e. they have the potential to become gases at lower pressures, higher up, when the magma expresses itself as a volcano, where they are released. A magma chamber is not a static repository, but as some minerals created within the magma chamber are heavier (and crystallize at a higher temperature) than others, they sink, and form heavier rocks (e.g. gabbro). The rest of the melt will rise due to being less dense than the surrounding rock, because it is hotter, contains volatiles, and has lost heavier, crystallized minerals; this process continues until the heat is spent, or it emerges as a volcano.
The heat within the magma chamber has the minerals in a heightened state of excitement, therefore they will take up more space, and generally be less dense than their cold equivalents.
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Is liquid magma less dense or more dense?
Liquid magma is more dense than the solid material around it.
Magma from deep inside earth rises toward the surface because?
Because magma is less dense than surrounding solid rock, so it is forced upward toward the surface.
Why does magma rises?
Mama rises when it is less dense than the rock surrounding it, and when the area around it allows free movement. The pressure allows the magma to convert form a liquid to a gas, which causes it to rise.
Why are metamorphic rocks formed by contact metamorphism usually not as dense as those formed by reg?
Because in contact the rock actually comes in contact with magma, this joins with the rock, so when it cools and become igneous rock, it's denser. In regular, or regional, the rock is formed from intense heat and pressure, but does not actually come in contact with magma.
What kind of rock forms from magma?
igneous rock
Is magma more dense then rock?
No. Magma varies in density, but it will be less dense than a solid rock of the same composition.
Is magma less dense then the surrounding rock?
yes
Why does magma come to the surface?
Magma is less dense than the surrounding rock; as such, it will rise toward the surface.
Could property of magma that cause it to be forced upward towards earth surface?
Because magma is less dense than the surrounding solid rock, it is forced upward toward the surface. When magma reaches the surface and flows from volcanoes, it is called lava.
Why does magma in a volcano rise up to Earth's surface?
Magma rises because it is less dense than the rock around it.
Is the name given to molten rock below the Earth's surface.?
Magma. Magma rises towards the surface when it's less dense than rock around it. Otherwise, it collects in magma chambers and cools, forming igneous rock.
What names is given to the molten rock below the earths surface?
Magma. Magma rises towards the surface when it's less dense than rock around it. Otherwise, it collects in magma chambers and cools, forming igneous rock.
Why magma rise toward the surface?
Magma is less dense than rock and is buoyant due to this density difference. It will seek out any weaknesses in the rock above it to reach the surface.
How is the igneous rock changed to sedimentary rock?
Sedimentary rock goes deep in the Earth and reaches magma. It then melts and becomes part of the magma. Since the newly formed magma is less dense than the surrounding rock it is lighter than the surrounding rock and it goes up and cools. It then becomes an Igneous rock.
Does magma collect underground in magma chambers?
Magma is less dense than rock and is buoyant due to this density difference. It will seek out any weaknesses in the rock above it to reach the surface.
Explain how magma causes a volcano to erupt Be detailed?
magma rises toward earth's surface as long as it is less dense than the surrounding rock.
What property of magma causes it to rise toword earth's surface?
It is less dense than its surrounding rock matter
