Plate tectonics cause movements of continents whether its colliding or separating. For more information go to: http://en.wikipedia.org/wiki/Plate_tectonics
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The movement of continents, also known as plate tectonics, is primarily caused by the convection currents in the Earth's mantle. These currents drive the movement of the rigid outer layer of the Earth (the lithosphere) in a process known as sea-floor spreading or subduction. This movement leads to the drifting of continents over geologic time scales.
The main reason continents look very different from 100 years ago is due to the process of plate tectonics, which causes the movement of Earth's continents over time. This movement can result in the reshaping of continents, the formation of mountain ranges, and the opening or closing of oceans.
Continents have formed through a process called plate tectonics, where landmasses on Earth's outer shell (lithosphere) are broken into pieces (plates) that move relative to each other. This movement causes the continents to drift and collide, leading to the formations we see today. The current arrangement of continents is the result of millions of years of this movement and collision.
The movement of continents is driven by plate tectonics, which is a slow process. Over millions of years, the movement of tectonic plates causes the continents to shift positions. Factors such as the size and composition of the plates, as well as the heat within the Earth's mantle, all contribute to the gradual movement of the continents to their current locations.
Continents have moved and continue to move due to the process of plate tectonics. This is driven by the movement of Earth's outer shell, which is divided into several large and small plates that glide over the mantle beneath them. The movement of these plates causes the continents to gradually shift positions over millions of years.
Plate tectonics cause movements of continents whether its colliding or separating. For more information go to: http://en.wikipedia.org/wiki/Plate_tectonics