Why does the theory of plate tectonics continue to change?

The theory hasn't changed as far as I've read but the plates continue to move and will as long as the earth maintains its inner heat. Www.scotese.com. read more

Plate Tectonics is a scientific theory. Unless an astounding discovery is made that is completely incompatible with the current theory, a scientific theory will change as our knowledge of how the universe works changes. read more

This new theory of large-scale change on the earth is known as plate tectonics. Plate tectonics is the theory that the surface of the earth is broken into larger pieces of crust called plates that ride along on a softer layer of the earth, known as the asthenosphere, which is the upper part of the mantle. read more

The theory of plate tectonics continues to change because there are still so many unanswered questions about it. Divergent Plate Boundary When two plates separate from each other, causing the seafloor to spread at a mid-ocean ridge and for lava to erupt, cool, and form new oceanic crust. read more