1 pound is 454 grams, so it will take about 23 bottles of weight 20 grams. or about 25 PET 500ml (still) bottles of weight 18 grams. or about 22 PET 500ml(sparkling) bottles of weight 20.7 grams. to make one pound. Views Â· View Upvotes.
Map of Pangaea with modern continental outlines. Pangaea or Pangea ( /pÃ¦nËdÊiËÉ/) was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It assembled from earlier continental units approximately 335 million years ago, and it began to break apart about 175 million years ago. In contrast to the present Earth and its distribution of continental mass, much of Pangaea was in the southern hemisphere and surrounded by a superocean, Panthalassa.
There is strong evidence that most of the Earth's continents have been periodically joined together into supercontinents as the movement of the plates brought them together. The most recent of these supercontinents, Pangaea, formed about 270 million years ago and broke up about 200 million years ago.The geologic record provides evidence of older supercontinents than Pangaea and a so-called supercontinent cycle of periodic supercontinent formation and break-up.What ultimately drives the cycle is a subject of scientific debate.here is strong evidence that most of the Earth's continents have been periodically joined together into supercontinents as the movement of the plates brought them together. The most recent of these supercontinents, Pangaea, formed about 270 million years ago and broke up about 200 million years ago.