Basically, it's thought to be because of movements in the plastic mantle below the crust.
1. The continents fit together like a jigsaw puzzle. 2. There are animal and plant species, extant and extinct, present on separated continents.
Subduction
The last super-continent is called Pangaea, which was formed about 245 million years ago. Some believe that Pangaea wasn't the first time all the continents were combined. There is evidence that there was another super-continent way before 245 million years ago that is called Rodinia (which separated for a while, then formed back together to form Pangaea, the latest super-continent).
This is possible. A landmass is a continent or other large body of land. However, what's present on this landmass can affect weather. For example, carbon emissions presented by humans affects weather.
Continental Drift Theory
Continental drift :)
The reason is because of glacial desposits. The other reason is because of ice bergs and continental drift.
Through the passage of time, the continents have gradually moved across the earth's surface into their present positions. This is called the continental drift.
Continents and tectonic plates drifted to their present positions due to the process of plate tectonics. This movement is driven by the slow shifting of the Earth's lithosphere on the more fluid asthenosphere beneath it. The movement of these plates over millions of years has resulted in the present configuration of the continents and ocean basins.
Continental drift.
continental drift
The fit of the continents' coastlines, identical rock formations and mountain ranges on different continents, and the distribution of similar fossils on separate landmasses are all evidence supporting the theory of continental drift and the existence of the supercontinent Pangaea.
Gondwanaland
Dogs are pets bread by Man and therefore dogs are present on all continents.
The continents merged into a single supercontinent known as Pangaea during the Paleozoic and Mesozoic eras, specifically in the late Paleozoic era around 300 million years ago. This supercontinent began to break apart during the Mesozoic era, leading to the formation of the current continents.
Plate tectonics.
The first continent wasn't any of the continents we have today. It was a lot of the continents that we know now, all joined together. It is known as Gondwala. The continent eventually broke up into the present day continents, eg. the east coast of South America used to fit into the west coast of Africa.