Question

What is happening to the old ocean floor as a new ocean floor is being made?

Answer 1

seafloor spreading

Step-by-step explanation:

Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor.