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.
club moss, horsetails, and ferns that were common 300 mya. 12. In what era were mountains formed? Paleozoic Era 13. When Pangaea formed, what type of exTncTon occurred? and the largest mass exTncTon in history wiped out approximately 90% of all marine animal species. 14. In what period did dinosaurs and mammals appear? Mesozoic Era 15. In what period did the Rocky Mountains form? Mesozoic Era 16. How long ago did the Cenozoic period arise? 65 million years, and counTng (includes present Tme) 17. How did the Great Lakes form? Â±he Great Lakes form as ice melts 18. How long has there been a recorded human history?