Dynamic Earth

• What forces do scientists think cause tectonic plates to move?

The continental drift, the divergent , convergent and transform boundaries. They believe that continents where once together. And they believe that the cause if tectonic plates is when an earthquake occurs when two plates past each other and create an earthquake shaking the plates and making them move. 

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

The continents will move even more. The Atlantic ocean and Indian ocean will expand as the Pacific shrinks. Southern California will pass San-Francisco as it moves to the northeast and a new ocean will form in the east Africa rift valley. And the Mediterranean sea will close as Africa moves Northward.