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Magma is heated to its molten state via heat from the Earth's core and that heat is held in by the earths crust. Once on the surface there is nothing to keep it molten and is it cooled by the outside air.

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Q: Why does magma deep underground stay liquid longer than lava on the surface?
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Related questions

What is the name of the underground liquid rock?

The underground liquid rock is called magma when it is beneath the Earth's surface. When magma reaches the surface, it is then referred to as lava.


Why is magma only made keep underground?

After magma reaches the surface it is no longer magma it is called lava.


What is the liquid called when the volcano is underground?

It's called magma when it is under the earth's surface. Once it erupts or becomes visible on the surface, its called lava


What is the liquid rock in a volcano called?

The liquid rock in a volcano is called magma when it is underground and lava when it reaches the Earth's surface.


Liquid rock on the surface of the earth is called?

Liquid rock on the surface of the earth is called lava.


What is lava called when it is underground?

When lava is underground, it is called magma. Magma is molten rock beneath the Earth's surface that can eventually erupt onto the surface as lava during a volcanic eruption.


What is the solid magma core of a volcano called?

Magma is underground, when it reaches the surface it becomes lava. So solidified magma is really lava. The lava flow is the liquid lava as it goes down the mountain, when hard its just hardened lava. Magma is underground, when it reaches the surface it becomes lava. So solidified magma is really lava. The lava flow is the liquid lava as it goes down the mountain, when hard its just hardened lava.


What word describes molten rock that is underground?

Molten rock is known as Magma when underground and has not yet been erupted onto the surface.


What name is given to molten rock underground?

Magma is a type of molten rock underground. Hope this helps. :)


What is the name when magma reaches the surface?

When magma reaches the surface, it is called lava.


Does magma cool above ground or beneath?

No. Molten rock under the surface is called magma. Molten rock above the surface is referred to as lava.


How does magma change the earth surface?

When magma erupts on to the earth's surface it hardens and forms new land.It depends on if your talking about magma or lava, lava is on the surface of the Earth and magma is inside (underground).