What is the basis on which continents and oceans are divided? Note: If the basis is landmass, then why are Europe & Asia, Asia & Africa and North America & South America considered as separate continent?

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The continents and the oceans are divided on the basis of the tectonic plates that are present under the landmasses. In the beginning there was a super continent called pangea. Due to the movement of the tectonic plates over time this super continent which was one landmass got broken up into two, which...
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The continents and the oceans are divided on the basis of the tectonic plates that are present under the landmasses. In the beginning there was a super continent called pangea. Due to the movement of the tectonic plates over time this super continent which was one landmass got broken up into two, which were known as Laurasia and Gondwana land and they were divided by a sea called the tethys sea. Over the last billions of years..these landmasses have been breaking up due to the movement of the these tectonic plates and a result of that movement is that today we have seven continents - Africa, Antarctica, Asia, Australia/Oceania, Europe, North America, and South America. This explanation is also known as the Continental Drift. I hope it helped you. read less
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The land on which we are living is not stable. It is floating on the lava which is in the core of the earth. Due to which the landmasses are divided and known as tectonic plates. These tectonics plates looks to be joined but have cracks due to which they are separated.
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As far as I know, the continents and oceans are divided on the basis of the tectonic plates.
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THE FORMATION OF THE EARTH’S CONTINENTS In the beginning, more than 4.6-billion years ago, the world was a ball of burning gas, spinning through space. At first, super-heated gases were able to escape into outer space, but as the Earth cooled, they were held by gravity to form the early atmosphere. Clouds...
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THE FORMATION OF THE EARTH’S CONTINENTS In the beginning, more than 4.6-billion years ago, the world was a ball of burning gas, spinning through space. At first, super-heated gases were able to escape into outer space, but as the Earth cooled, they were held by gravity to form the early atmosphere. Clouds began to develop as water vapour collected in the air and then it began to pour with rain, causing the early oceans to rise up. It took hundreds of millions of years for the first land masses to emerge. About 250-million years ago, long, long after the Earth had formed, all the continents of the time had joined together to form a super-continent called Pangaea. This super-continent broke up about 200-million years ago to form two giant continents, Gondwana and Laurasia. Gondwana comprised what is now Africa, South America, Australia, Antarctica and India. The Indian sub-continent lay off the east coast of Africa, before it broke off and moved north rapidly. It collided with Asia, creating one of the world’s greatest mountain ranges, which extends for more than 2,500 kilometres – the Himalayas. By now, our world had started to look like something we would recognise. The amazing process of plate tectonics, in which the Earth’s land masses move slowly across the Earth’s crust, is still continuing. read less
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