Question

"Seafloor spreading occurs in the Pacific Ocean in the same way that it does in the Atlantic Ocean. New crust emerges from the ridge and pushes older crust away from the ridge. Older crust is subducted when the oceanic plate collides with the continental plates. Because more crust is subducted in the Pacific Ocean than in the Atlantic Ocean, more crust is being subducted in the Pacific Ocean than is being created. This is causing the Pacific Ocean to shrink, while the Atlantic Ocean expands." explain in a less complicated way

Answer 1

Seafloor spreading happens in both the Pacific and Atlantic Oceans, where new ocean crust forms at underwater ridges and pushes the older crust away from the ridge. In the Pacific Ocean, when the ocean crust meets land (continental plates), the older crust gets pushed underneath the land (this process is called subduction).

In the Pacific, more crust is being pulled back down into the Earth than is being made at the ridges. This means that the Pacific Ocean is getting smaller over time. In contrast, the Atlantic Ocean is getting bigger because it creates more new crust than it loses.