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The text connects plant and fern fossils to a major climate shift, then explains how long-term continental movement transformed warm regions into today’s ice-covered continent. It introduces Earth’s three-layer structure and details lithosphere plates moving atop the asthenosphere, establishing the foundation for the plate tectonics theory.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":15,"@type":76,"position":81},"https://docshare.wps.com/document/literature/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/plate-tectonics-chapter-1-frozen-fossils-at-the-bottom-of-the-world/569449/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/plate-tectonics-chapter-1-frozen-fossils-at-the-bottom-of-the-world/569449.png","ImageObject",300,407,{"name":92,"@type":93},"Kyle","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-22","2026-10-13",true,{"@type":102,"interactionType":103,"userInteractionCount":81},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"Why was the discovery of Lystrosaurus fossils in Antarctica puzzling?","Question",{"text":112,"@type":113},"Lystrosaurus had lived between 180 and 225 million years ago, but fossils previously appeared in Africa, India, and China rather than Antarctica. Its presence raised the question of how the animal reached an isolated continent at the bottom of the world.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How did Antarctic climate change from warm to frozen according to the text?",{"text":117,"@type":113},"Fossils of ferns and trees suggest Antarctica was much warmer in the distant past. The explanation given is that Antarctica moved, drifting away over millions of years until it reached a colder location with permanent snow and ice.",{"name":119,"@type":110,"acceptedAnswer":120},"What basic Earth structure is used to introduce plate tectonics?",{"text":121,"@type":113},"Earth is described as three major layers: a hot iron-nickel core, a slowly flowing rock mantle called the asthenosphere, and an outer crust. The lithosphere consists of the crust plus the upper mantle and is broken into tectonic plates that move atop the asthenosphere.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},569449,1792438880,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":14,"category_name":15,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":81,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145},3985741905716,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","PLATE TECTONICS  \nвоЗЕРОВАУИвнау  \nJAN 2008  \nGreat ldeas of SciencePLATE TECTONICSTwenty-First Century BooksMinneapolis31150010540132  \nby Rebecca L.Johnson  \nTFCB  \n是  \nFor my brother Dan,the great scientist in my life  \nText copyright ◎2006 by Rebecca L.Johnson  \nAll rights reserved.International copyright secured.No part of thisbook may be reproduced,stored in a retrieval system,or transmittedin any form or by any means—electronic,mechanical,photocopying,recording,or otherwise—without the prior written permission ofLerner Publishing Group,Inc.,except for the inclusion of briefquotations in an acknowledged review.  \nTwenty-First Century Books  \nA division of Lerner Publishing Group,Inc.241 First Avenue NorthMinneapolis,Minnesota 55401 U.S.A.  \nWebsite address:www.lernerbooks.com  \n# Library of Congress Cataloging-in-Publication Data\n\nJohnson,Rebecca L.  \nPlate tectonics /by Rebecca L.Johnson.p.cm.—(Great ideas of science)  \nIncludes bibliographical references and index.ISBN-13:978-0-8225-3056-5(lib.bdg.:alk.paper)ISBN-10:0-8225-3056-2(lib.bdg.:alk.paper)  \n1.Plate tectonics—Juvenile literature.I.Title.II.Series.QE511.4.J642006551.1'36—dc222004019732  \nManufactured in the United States of America234567-DP-121110090807  \n# INTRODUCTION\n\nFrozen Fossils  \nat the Bottom of the WorldCHAPT ER 1  \nA Perfectly Puzzling FitCHA PTE R ·215From Uniformitarianism toContinental DriftCHAPTER 324Alfred Wegener³s  \n# Controversial HypothesisCH APT ER 4\n\nUnlocking the Ocean³sSecrets  \nCHAPT ER 542More EvidenceCH APT ER 655A Theory Takes ShapeGloSSaryTimelineBiographiesSource Notes  \n77676  \nSelect BibliographyFurther ReadingWebsitesIndex  \n19  \n# FROZEN FOSSILSAT THE BOTTOM OFTHE WORLD\n\nThe frigid Antarctic wind howled as the scientistsworked,bundled up in parkas,mittens,and heavyboots.They were perched on a cliff called GraphitePeak,located deep in the Transantarctic Mountains.Suddenly,one of the scientists shouted.He’d foundsomething!The pale sun glinted off fossil bones nes-tled among the rocks.  \nAs it turned out,the bones belonged to Lystrosaurus,an ancient reptile about the size of a big dog.It was 1969,and these were among the first fossils of a vertebrate an-imal (one with a backbone)ever found in Antarctica.What made this discovery even more remarkable wasthat Lystrosaurus fossils had previously been found inAfrica,India,and China,where the reptile was known tohave lived between 180 and 225 million years ago.Thisnew find raised a puzzling question.How didLystrosaurus get to Antarctica,an isolated continent atthe bottom of the world?  \nThe mystery went deeper.Fossils of ferns and treeshad been found throughout the Transantarctic Mountainsand in other parts of Antarctica.Delicate ferns don't growin subzero temperatures.Obviously,Antarctica had beena much warmer place in the distant past.How had ittransformed from a land of ferns and forests into a frozenwasteland?  \nThe solution to these fossil mysteries is that Antarcticamoved.Long,long ago it was joined to Africa,SouthAmerica,and Australia.It lay closer to the equator then,where the climate\"is mild.And Lystrosaurus—togetherwith other animals that later became extinct—roamedfreely on this huge landmass.  \nScientists found this Lystrosaurus fossil in South Africa.  \nOver time,the land broke apart and the pieces driftedaway from each other.They spread all across the globe.The large piece that became Antarctica,headed south.This drifting took millions of years.As Antarctica nearedits current location,it slowly changed from a warm placewith many plants and animals to a cold one with perma-nent snow and ice.The process that caused Antarctica—and all the other continents—to drift over time is knownas plate tectonics.  \nUnderstanding plate tectonics starts with knowingEarth's basic structure.If you could slice through ourplanet,you'd find it is made up of three major layers.Theinnermost layer is a very hot core of iron and nickel.Theinside of this core is solid,and the outside is liquid.Them","cbCaijxunIlOE1nm","https://ap.wps.com/l/cbCaijxunIlOE1nm","pdf",4092957,88,"English","# INTRODUCTION\n## Frozen Fossils at the Bottom of the World\n## From Uniformitarianism to Continental Drift\n## Unlocking the Ocean's Secrets\n## More Evidence\n## A Theory Takes Shape\n## Glossary\n## Timeline\n## Biographies\n## Source Notes\n## Select Bibliography\n## Further Reading\n## Websites\n## Index","[{\"question\":\"Why was the discovery of Lystrosaurus fossils in Antarctica puzzling?\",\"answer\":\"Lystrosaurus had lived between 180 and 225 million years ago, but fossils previously appeared in Africa, India, and China rather than Antarctica. Its presence raised the question of how the animal reached an isolated continent at the bottom of the world.\"},{\"question\":\"How did Antarctic climate change from warm to frozen according to the text?\",\"answer\":\"Fossils of ferns and trees suggest Antarctica was much warmer in the distant past. The explanation given is that Antarctica moved, drifting away over millions of years until it reached a colder location with permanent snow and ice.\"},{\"question\":\"What basic Earth structure is used to introduce plate tectonics?\",\"answer\":\"Earth is described as three major layers: a hot iron-nickel core, a slowly flowing rock mantle called the asthenosphere, and an outer crust. The lithosphere consists of the crust plus the upper mantle and is broken into tectonic plates that move atop the asthenosphere.\"}]","Plate Tectonics - Chapter 1 - Frozen Fossils at the Bottom of the World | PDF",1791875843,136]