Mid-Ocean ridges are like long chains of mountains underwater. It is also the longest mountain range in the whole water, of course underwater. It is more 56,000 kilometers (35,000) miles long. This series of mountains and valleys marks where the Earth's crustal plates are moving apart.
The Layers of the Earth
Tuesday, April 7, 2009
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The Pangea
Pangea was one super continent that was on the earth 200,000,000 years ago. The word Pangea means 'all land' in Greek. The pieces that made up this super continent split up and drifted slowly apart, and became the seven continents today.
Scientists say that they knew there was Pangea because there were the same matching fossils that were found in Africa and South America. Also, all the continents would fit almost perfectly together like a jig-saw puzzle.
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