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Why does molten rock from the mantle come to the surface at the mid-ocean ridges?
Wiki User
∙ 10y ago
Magma is less dense than surrounding rock, so it rises up. Since there is no path down, there is a pressure build-up which forces the magma out of the volcano .
Wiki User
∙ 15y ago
Wiki User
∙ 13y agoThink of it like this like french fries and ketchup. You put the ketchup down and put the fries on top. The weight of the fries on the ketchup WILL MAKE THE KETCHUP EASE UP
Wiki User
∙ 15y agoMolten rock or magma rises up from the asthenosphere towards the surface as it's propelled by gases surrounding it.
Wiki User
∙ 13y agoMagma rises to the surface at the ridges because the ridges is where the plates are moving away from each other. When they pull away, they make an area where there is no crust just magma.
Wiki User
∙ 10y agoThere is so much pressure down below the molten rock has to go somewhere and it can only go up.
Wiki User
∙ 11y agoDue to large amount of pressure
Wiki User
∙ 12y agoBecause you died
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Where do midocean ridges intersect the landmasses?
Midocean ridges are areas where continents broke apart. Midocean ridges are closest to the landmasses in younger oceans. One example where a midocean ridge intersected a landmass is the Arabian sea, which was formed by the pulling apart of the Arabian Peninsula and Africa.
How have convection currents changed the surface of the earth?
Convection currents occur in the semi-molten mantle. They are created by heat within the earth. As the mantle heats, the rock rises. When it cools, it sinks back down. This movement causes changes in the surface of the Earth.
Where does molten material that rises from the mantle erupt?
it erupts from the mantle witch is part of the structure of the earth.
How convection currents affect the plates?
The rock of the upper mantle known as the asthenosphere is plastic-like but not molten. It acts like a conveyor belt, moving heat from Earth's interior upward, and cooled material downward in a big loop. New crust is created where mantle material reaches the surface at places called mid-ocean ridges. Older, colder oceanic crust is subducted and drawn into the mantle, completing the loop.
What kind of rock is made out of molten material?
Magma is liquefied rock, viscous rather than "plastic" (as in the rheid of the hot mantle). Magma can form within the lithosphere, in locations such as subduction zones, continental rift zones, mid-ocean ridges, and hotspots above the mantle.* The pressure in the mantle is too high for rock to become liquid. In the outer core, the heat becomes high enough to form liquid, but this dense liquid can never reach the surface of the Earth.
Where do midocean ridges intersect the landmasses?
Midocean ridges are areas where continents broke apart. Midocean ridges are closest to the landmasses in younger oceans. One example where a midocean ridge intersected a landmass is the Arabian sea, which was formed by the pulling apart of the Arabian Peninsula and Africa.
What material that rises to surface at mid-ocean ridge?
Sea-floor spreading due to convection currents in the Earth's mantle (although this is still under investigation). Magma is pushed up through the cracks in the sea-floor as the plates move apart.
How do the divided plates in the earth's upper mantle move?
Tectonic Plates are floating on the semi-molten Mantle. Currents in the molten layer, eruptions of new lava round the edges, and the forming of deep ocean volcanic ridges, help to move the plates across the Earth's surface.
Where molten rock keeps coming out of the surface of the earth?
mid-oceanic ridges
What are the differences between ocean ridge and seamount?
The midocean ridges are the spreading centers where the plates are moving apart. The seamounts are extinct volcanos produced as the plate passed over a mantle hotspot.
Where are the midocean ridges offset the most by faults?
At transform faults or transform zones.
How have convection currents changed the surface of the earth?
Convection currents occur in the semi-molten mantle. They are created by heat within the earth. As the mantle heats, the rock rises. When it cools, it sinks back down. This movement causes changes in the surface of the Earth.
Where does molten material that rises from the mantle erupt?
it erupts from the mantle witch is part of the structure of the earth.
What do mid-ocean ridges transfer heat energy from?
Mid-ocean ridges transfer energy from the mantle/asthenosphere/lithosphere to the surface. The energy is from the deep Earth.
How convection currents affect the plates?
The rock of the upper mantle known as the asthenosphere is plastic-like but not molten. It acts like a conveyor belt, moving heat from Earth's interior upward, and cooled material downward in a big loop. New crust is created where mantle material reaches the surface at places called mid-ocean ridges. Older, colder oceanic crust is subducted and drawn into the mantle, completing the loop.
What kind of rock is made out of molten material?
Magma is liquefied rock, viscous rather than "plastic" (as in the rheid of the hot mantle). Magma can form within the lithosphere, in locations such as subduction zones, continental rift zones, mid-ocean ridges, and hotspots above the mantle.* The pressure in the mantle is too high for rock to become liquid. In the outer core, the heat becomes high enough to form liquid, but this dense liquid can never reach the surface of the Earth.
Is the Mid-Oceanic Ridge in the middle of the Atlantic Ocean?
One of the midocean ridges is, but others are in other oceans, seas, and bays.
