The theory of the continental drift explained how the continents had shifted their original positions. Once all joined together, as a "Urkontinent." Many people thought it was the mountains making them sink, but then that was dismissed because continental rocks were too light to sink to the ocean floor.
Five oceans are in the world, which are the Arctic, Atlantic, Indian, Pacific and Southern.
The unconformity that is found in a geological cross section indicates that in this area erosion happened.
Erosion is a natural process in which the surface of the Earth (<span><span>soil, rock, or dissolved material</span>) gets worn down.
The cause for erosion can be wind, water, glacier ice or other natural element.
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Seven continents - Africa, Antarctica, Asia, Australia/Oceania, Europe, North America, and South America
Arid
<span>Lacking moisture, especially having insufficient rainfall to support trees or woody plants</span>
