Well to answer your question magma forms in all the ways but if it forms at a low temp it need a higher pressure. and it forms at a high temp it needs a low pressure.
Hope this helped this might not be 100% right though
The degree of temperature and exertion of pressure by the molten materials (magma) within the mantle is directly proportional to its depth. This means that, the deeper you go down the mantle the higher the degree of temperature and pressure exerted.
thez nuts
The high pressure within the sun is the result of the sun's very large mass, and resulting strong gravitational field. The high temperature is the result of nuclear fusion.
Diamonds form in the mantle due to high pressure and high temperature conditions. Carbon atoms are forced into a tightly packed arrangement, forming diamond crystals. These conditions are typically found deep within the Earth's mantle, where diamonds can be brought closer to the surface through volcanic eruptions.
If the gas cannot expand, increasing its temperature would lead to an increase in pressure within the container. The container may rupture or explode if the pressure exceeds its capacity. It is important to control the temperature and pressure within the container to prevent such incidents.
The temperature range within the stiffer mantle is between 500 and 900 degrees Celsius. This region is known as the upper mantle and is composed of solid rock that can deform under high pressure and temperature.
The degree of temperature and exertion of pressure by the molten materials (magma) within the mantle is directly proportional to its depth. This means that, the deeper you go down the mantle the higher the degree of temperature and pressure exerted.
thez nuts
The pressure within the stiffer mantle ranges from about 14 GPa (gigapascals) at the upper boundary to over 136 GPa at the core-mantle boundary. This high pressure contributes to the solid-state behavior of the mantle material despite its high temperature.
High temperature and high pressure are inferred to occur within Earth's stiffer mantle. As depth increases in the mantle, both temperature and pressure increase. This combination of high temperature and pressure allows for the solid rock to exhibit ductile behavior, resulting in the flow of solid material over long periods of time.
The high pressure within the sun is the result of the sun's very large mass, and resulting strong gravitational field. The high temperature is the result of nuclear fusion.
Diamonds are made naturally deep within the Earth's mantle under high pressure and temperature. However, diamonds can also be created in a lab using high pressure and temperature to mimic the conditions in the Earth's mantle. This process is known as chemical vapor deposition or high-pressure high-temperature synthesis.
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.
Magma typically forms in the Earth's mantle, which is a layer beneath the crust. It forms as a result of the melting of rocks due to high temperature and pressure within the mantle. This molten rock can then rise to the surface through volcanic activity.
The melting temperature of materials is dependent on the pressure that is applied, whereby the higher the pressure, the higher the melting temperature. As such the rocks in the mantle are experiencing such a high pressure, that their melting point is driven up beyond the temperature within the Earth's mantle so they remain solid.
2000 celcius
Magma is propelled to the surface by temperature differences, which cause convection currents. The temperature differences result from radioactive elements within the mantle.