mid-ocean ridges form when hot magma is forced up from the asthenosphere and hardens, forming a new oceanic crust, pushing the 2 adjacent plates apartEvidence comes from Palaeomagnetism, records of changes in the magnetic fields of Earth.When lava solidifies minerals line up with earth's magnetic directionMid Ocean Ridges show patterns of magnetic direction

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mid-ocean ridges form when hot magma is forced up from the asthenosphere and hardens, forming a new oceanic crust, pushing the 2 adjacent plates apart

Evidence comes from Palaeomagnetism, records of changes in the magnetic fields of Earth.
When lava solidifies minerals line up with earth's magnetic direction
Mid Ocean Ridges show patterns of magnetic direction