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A volcano is technically a weak spot in Earth's crust where molten material like magma reaches the surface. Magma is made near the surface by convergent (colliding) or divergent (spreading) boundaries. Most volcanoes form near convergent boundaries where the oceanic plate submerges because of the density of the plate.
Also, a hot spot may form a volcano. A hot spot is where magma from the mantle reaches the surface. As the crust moves from convection currents in the mantle, the hot spot is near the crust. Whenever the hot spot passes under a weak spot in the crust, the pressure in the magma is strong enough to push through. As the crust continues moving, the hot spot makes different volcanoes in a row, called an island arc. An example of this is Hawaii.
What else can I help you with?
What is an opening in earths surface from which lava may flow?
volcanoes
What igneous rocks formed or on or near earths surface?
Volcanoes.
When earths regions of earths surface sinks down what is it called?
Subsidence.
How do volcanoes takes place?
Volcanoes are essentially holes in the earths surface through which magma and lava can erupt. when pressure builds up below the earths crust, magma is then forced violently out of the volcanoes.
How has earths surface changed since the beginning of earths time?
The continents have moved, Volcanoes and mountains have made hige changes in the earths suface too.
Plains regions cover approximately how much of earths land surface?
Plains regions cover about 55% of the Earth's land surface.
How can volcanoes cause melted rock?
Volcanoes do not cause rocks to melt, they are just the exit where melted rock come to the earths surface.
How do earthquake and volcanoes change the earths surface?
earthquakes and volcanoes change the worl by pollution for example car pollution, Factorys etc...
How does volcanos change the earths surface?
volcanoes change the earths surface due to the lava set hard and drys which can make the surface bobbly and ruff also it makes the land more fertilekill people
What causes volcanoes to erupt under earths surface?
mostly earthquakes or plate tectonic movement.
Which term best describes the location where magma rises to earths surface and flows out of an opening in the crust?
Volcanoes
Mountains formed by magma that reaches the Earths surface are?
Mountains formed by magma that reaches the Earth's surface are called volcanoes.
