magma
Once magma breaks through the earths crust it is called"lava"
An opening in the Earth's crust where melted rock reaches the surface is called a volcano.
it is just called molten rock, and it comes out of the Earths crust via volcanoes. you can also say that its melted lava
that is a volcano starting 100 years would pass and then it becomes more of a volcano.
Lava....when its under the earths crust its called magma.
The melted rock below the crust is magma. Above ground it is lava.
volcano
Lava is molten rock escaping through holes and cracks (eg volcanos) in the Earth's crust. The molten rock when under the Earth's crust is called magma.
That definition could apply to any volcano.
The material that melted to form the early continents was primarily basaltic oceanic crust. This crust was melted by the heat generated in the Earth's interior, resulting in the formation of granitic continental crust through processes like partial melting and differentiation.
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When new crust is made, like at a spreading center, old crust must be destroyed, like at a subduction zone, where it is brought back into the inner earth and melted and recycled through.