What do you think will happen if two oceanic plates move away from each other?

When two oceanic plates move away from each other, this process is known as divergent plate tectonics or a divergent boundary. As the plates separate, magma from the mantle rises to fill the gap. When the magma reaches the ocean, it cools and solidifies, forming new oceanic crust. This phenomenon is known as seafloor spreading.

At the location where seafloor spreading occurs, features such as mid-ocean ridges are formed. These underwater mountain ranges are the direct result of the upwelling of magma that has created new seabed. As a result of the continuous creation of new crust, the ocean floor slowly expands. Over time, this can lead to the formation of new ocean basins.

Additionally, the areas around the divergent boundary often experience volcanic activity and earthquakes due to the movement of magma and the shifting of the Earth's crust.