When the surface of solid materials scrape and grind against each other it is called ?

ANSWER:

When surface of solid materials scrapes and grind against each other it is called abrasion.

EXPLANATION:

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.