Dynamic Earth

What Forces do scientists think cause tectonic plates to move?

Scientists believe the all the continents are floating around on the mantle which is liquid and the continents keep moving away from where they started in the super continent called Pangaea. If you look at a map that shows the previous movements of the continents, they all fit together and you can see their paths of their movement. It makes sense that they are floating on the mantle. The mantle is a liquid and its what the crust is sitting on. The mantle is not very dense so it would make sense that the continents float around on it. I think about a bunch of rubber ducks in a bath tub and they will move once there is a disturbance in the water. That is a basic explanation of what happened to make the continents spread apart.

According to the theory of plate tectonics, what changes will occur to the oceans and the continents over the next millions of years?

No one actually knows what may happen within the next million years but I believe that the continents will continue moving  away from each other and eventually, North America is going to collide with Asia and Japan because they are in a collision coarse towards each other. I think that the pacific ocean is going o shrink and all the water from the pacific ocean is going to go under South America and connect with the Atlantic and the Atlantic will be even bigger. The biggest ocean. The plates underneath the oceans are still having magma come up and form new crust so either way there is going to be more Continental drift.