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When magma forms within the mantle it is most often a result of?
Either the loss of confining pressure causing the melting point of the material to drop below the in-situ temperature or due to the presence of volatiles which enter the mantle where subduction occurs and also lower the melting point of the material.
What is the normal melting point?
The normal melting point is the temperature at which a substance changes from a solid to a liquid at standard atmospheric pressure (1 atm). The normal melting point is a characteristic physical property of a substance and can vary depending on the specific material.
Why doesn't the earth's iron core melt?
The Earth's iron core doesn't melt despite its extremely high temperature and pressure because the pressure from the weight of all the material above it raises its melting temperature significantly. This results in the iron core remaining solid even at temperatures well above its melting point.
What process is involved in the formation of all igneous rocks but not in the formation of metamorphic rocks?
mountain building
When pressure on a piece ice is increased its melting point will be?
When pressure on a piece of ice is increased, its melting point will decrease. This is because an increase in pressure will stabilize the solid phase, making it harder for the ice to melt into liquid water.
How does pressure determine whether the mantle is solid or liquid?
The melting temperature of materials is affected by their confining pressure. The higher the pressure the higher the melting temperature. As such as you move deeper into the mantle, the tempraeture will increase, but because of the overlying material so to will the confining pressure which drives up the melting temperature. When high temperature mantle material moves nearer to the surface such as near a mid-ocean-ridge the confining pressure falls faster than the materials temperature and this can cause the melting point to drop below the temperature of the material leading to melting.
What mining of melting point?
The melting point is the temperature at the solid and liquid states of the material are in equilibrium; if the temperature is even very slightly above the melting point, the material will melt, and if it's even very slightly below, the material will freeze. Technically the melting point depends on the pressure, but usually the dependence is not very strong; you have to change the pressure a lot (and by "a lot" I mean many multiples of normal atmospheric pressure) to change the melting point by enough to even notice.
Why expansion of rock is important in the formation of magma?
The melting temperature of materials is affected by the pressure they are under. So when "rock" in the Earth's mantle experiences a decrease in confining pressure, not only does it expand, it's melting temperature drops. If the melting temperature of the material drops below the background (also known as the in-situ) temperature, then melting will occur and in this case magma will form.This typically occurs in the earth where hot upwelling mantle material experiences a decrease in confining pressure (as there is less and less overlying material as it rises) which ultimately causes adiabatic or decompression melting.
Why is the expansion of rock is important in the formation of magma?
The melting temperature of materials is affected by the pressure they are under. So when "rock" in the Earth's mantle experiences a decrease in confining pressure, not only does it expand, it's melting temperature drops. If the melting temperature of the material drops below the background (also known as the in-situ) temperature, then melting will occur and in this case magma will form.This typically occurs in the earth where hot upwelling mantle material experiences a decrease in confining pressure (as there is less and less overlying material as it rises) which ultimately causes adiabatic or decompression melting.
Why the expansion of rock is important in the formation of magma?
The melting temperature of materials is affected by the pressure they are under. So when "rock" in the Earth's mantle experiences a decrease in confining pressure, not only does it expand, it's melting temperature drops. If the melting temperature of the material drops below the background (also known as the in-situ) temperature, then melting will occur and in this case magma will form.This typically occurs in the earth where hot upwelling mantle material experiences a decrease in confining pressure (as there is less and less overlying material as it rises) which ultimately causes adiabatic or decompression melting.
Explain why the expansion of rock is important in the formation of magma.?
The melting temperature of materials is affected by the pressure they are under. So when "rock" in the Earth's mantle experiences a decrease in confining pressure, not only does it expand, it's melting temperature drops. If the melting temperature of the material drops below the background (also known as the in-situ) temperature, then melting will occur and in this case magma will form.This typically occurs in the earth where hot upwelling mantle material experiences a decrease in confining pressure (as there is less and less overlying material as it rises) which ultimately causes adiabatic or decompression melting.
What does the inner core of the earths layers do when its in so much pressure?
The amount of pressure overcomes the material's disposition to melting at high temperature. It solidifies.
When a material is melting the temperature?
When a material is melting, the temperature is likely to be increasing. That or the temperature is just above the material's melting/freezing point.
How are pressure and heat involved in melting rock in the mantle?
Pressure and heat in the mantle cause the rocks to become ductile and start deforming. As pressure decreases and heat increases due to the rising of magma, the rocks reach their melting point, allowing them to melt. This melted rock can then rise to the surface as magma and form igneous rocks.
Why is the earth's inner core in a solid state when it's temperature is above the melting point of material that makes it up?
The inner core of the Earth is solid due to the immense pressure from the layers above it. This pressure prevents the materials from melting even though the temperature is above the melting point. The combination of high pressure and high temperature keeps the inner core in a solid state.
Are melting point unique to elements?
Yes, the melting point of a substance is unique and specific to that substance. It is the temperature at which a solid material changes into a liquid at atmospheric pressure. Each element or compound has its own distinct melting point.
What is the temperature and pressure at which a solid becomes a liquid?
Varies between substances. Ex The vaporization pressure and temperature of water is different from mercury.ans2. The concept you should study is the Triple Point of the material. The temperature and pressure at which the material can co-exist as liquid, solid, and gas phases.For water, this temperature is 273.16oK at 0.6117 kPa. (and has been so for 50 years, but 0oC is adequate for ordinary mortals.)For CO2 the TP is at 216.55oK at 517kPa.For mercury, TP is at 23.2oK, at 1.65x10-7 kPa.
