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Subduction and folding.
The seafloor ,may be "spreading" in the center but that doesn't necessarily mean it's getting bigger; at the edges it may be slipping underneath a continental plate (subduction) or piling up on itself to form mountains (folding).
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∙ 7y ago
Yanira lopez
because
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∙ 8y agoEarth does not get larger when new rock is added at mid-ocean ridges. As new rock bubbles up at the ocean ridges, the same amount of old ocean floor descends into ocean trenches at subduction zones, and back into the mantle. This keeps the Earth exactly the same size.
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∙ 14y agoThe Earth does not enlarge because the seafloor is spreading, but the "plates" of the Earth's crust is not. As long as the crust does not get bigger (along with the magma and several layers of it inside the Earth), nor will the Earth.
Wiki User
∙ 14y agoThe mass of the Earth stays approximately the same
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∙ 13y agoThe mass of the Earth stays approximately the same!
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∙ 11y agoit doesn't, the seafloor spreading is just increasing the amount of oceanic crust- not the size of the earth.
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∙ 7y agoOld oceanic crust gets subjected into the mantle just as fast as new crust forms at mid-ocean ridges.
Wiki User
∙ 12y agoBecauSe it just doesnt
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What kinds of ocean currents might cause seafloor spreading?
Ocean currents have no effect whatsoever. Seafloor spreading is caused by convection currents in the rock of the earth's mantle.
Does seafloor spreading cause the earth's crust to expand?
New oceanic crust is being created at seafloor spreading zones, and crust is alternately being subducted and destroyed at subduction zones.
What is the difference of seafloor spreading and continental drift?
In continental drift it says that they were drifted apart by the spin of the earth and in seafloor spreading the earths crust is drifted apart by the ridges in the mid-ocean.
In which earth layer are most convection currents that cause seafloor spreading thought to be located?
The Asthenosphere, a.k.a. the Plastic Mantle.
What is the process by which new oceanic lithosphere forms as magma rises to earth's surface and solidifies at a mid-ocean ridge?
seafloor spreading
What kinds of ocean currents might cause seafloor spreading?
Ocean currents have no effect whatsoever. Seafloor spreading is caused by convection currents in the rock of the earth's mantle.
Which Earth layer is responsible for filling in gaps left by seafloor spreading?
mantel
Does seafloor spreading cause the earth's crust to expand?
New oceanic crust is being created at seafloor spreading zones, and crust is alternately being subducted and destroyed at subduction zones.
What is the difference of seafloor spreading and continental drift?
In continental drift it says that they were drifted apart by the spin of the earth and in seafloor spreading the earths crust is drifted apart by the ridges in the mid-ocean.
How are magnetic patterns in sea floor rock evidence of seafloor spreading?
Magnetic alignment of rocks, in alternating strips that run parallel to ridges, indicates reversals in Earth's magnetic field and provides further evidence of seafloor spreading.
In which earth layer are most convection currents that cause seafloor spreading thought to be located?
The Asthenosphere, a.k.a. the Plastic Mantle.
How do earth's magnetic signatures support the idea that continents move?
Scientists indicated that the seafloor was spreading, so the poles "reverse"
In the process of sea-floor spreading what happens when magma rises to Earth's surface and solidifies?
Yes. Seafloor spreading is the term given to the creation of new seafloor at divergent boundaries. At a divergent boundary, two oceanic plates move apart, which obviously means that something must then surface to fill the void. This is where the magma rises from the Earth's interior and cools to become seafloor. On the other end, at convergent boundaries, the old seafloor is forced under the continental plates, where it is recycled back into the Earth's magma supply.
How do you explain the process of the seafloor spreading?
The seafloor spreading definition is the geologic process that occurs at the boundary between 2 plates where molten material within the earth pushes its way up, causing the plates to move away from each other. At these divergent boundaries molten material cools and hardens, creating new oceanic crust or seafloor
What is the process by which new oceanic lithosphere forms as magma rises to earth's surface and solidifies at a mid-ocean ridge?
seafloor spreading
How does seafloor spreading results in new oceanic crust?
As the seafloor spreads apart, magma from the mantle inside the earth bubbles up to the ocean and hardens in the cool temperatures, producing new oceanic crust
Where on earth would you find seafloor spreading?
You can find the seafloor spreading in the middle of the Atlantic Ocean. It is pushing Europe and Africa away from North and South America. You can go to Iceland and stand on the place where the spreading seafloor comes onto land. There, you can put one foot on Europe and one foot on America. It would be quite a while before your feet became another inch apart.
