TAILIEUCHUNG - PREHISTORIC WORLD

The Earth is about billion years old. During that time, there have been extreme changes in layout of the land and the oceans, as well as vast differences in the kinds of life that have walked on Earth’s land, flew in its sky, and swam in its seas. While everything looks to be stable in our eyes, the Earth is constantly changing, continents are moving, and life continues to change. | School Specialty Publishing PREHISTORIC WORLD SB School Specialty n Publishing This edition published in the United States in 2006 by School Specialty Publishing a member of the School Specialty Family. Copyright ticktock Entertainment Ltd 2005 First published in Great Britain in 2005 by ticktock Media Ltd. Printed in China. All rights reserved. No part of this book may be reproduced stored in a central retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise withouth the prior written permission of the publisher. Written by Dougal Dixon. Special thanks to Elizabeth Wiggans. Library of Congress-in-Publication Data is on file with the publisher. Send all inquiries to School Specialty Publishing 8720 Orion Place Columbus OH 43240-2111 ISBN 0-7696-4258-6 123456789 10 TTM 11 10 09 08 07 06 2 CONTENTS HOW TO USE THIS BOOK4 THE AGE OF THE EARTH6 Oldest minerals rocks and meteorites The Precambrian eon Phanerozoic eon to present day Major events Previous estimates of the age of the Earth Geological timescale PLATE Continental drift Seafloor spreading Another theory Some speeds Features of the Earth caused by plate movement Cross section of the Earth ROCKS AND Types of rock Sediments to sedimentary rock Examples of igneous rock Examples of sedimentary rock The rock cycle Examples of Metamorphic rock FOSSILS_12 How fossils form The uses of fossils Before fossilization During fossilization Fossil assemblages After fossilization PRECAMBRIAN14 Precambrian world Stromatolites Vendian period Snowball Earth Animals of the Vendian EARLY PALEOZOIC ERA_16 Paleozoic era Land animals Cambrian Ordovician Silurian The Burgess shale Calymene .

• Lịch sử - Văn hoá
• Stromatolites
• Calymene
• Cephalaspis
• Eusthenopteron
• Ichthyostega
• Fossil assemblages
• hòn đá stromatolites
• khoa học tự nhiên
• sinh học
• nguồn gốc sự sống
• đá trầm tích cổ