Genre Nonfiction Comprehension Skill Picture Clues Text Features Captions Labels Glossary Science Content Natural Resources Scott Foresman Science 2.5 ISBN 0-328-13783-9 ì<(sk$m)=bdhidb< +^-Ä-U-Ä-U Vocabulary Extended Vocabulary boulder erosion minerals natural resource pollution recycle sand weathering atoms crystal facets opaque precious semiprecious synthetic transparent What did you learn? 1. What is the difference between transparent and opaque gems? 2. Name two gemstones that come from ancient plants. 3. In this book by Joyce A. Churchill you read about diamonds. Write to explain how diamonds are found and turned into gemstones. Use words from the book as you write. 4. Picture Credits Every effort has been made to secure permission and provide appropriate credit for photographic material. The publisher deeply regrets any omission and pledges to correct errors called to its attention in subsequent editions. Photo locators denoted as follows: Top (T), Center (C), Bottom (B), Left (L), Right (R), Background (Bkgd). Scott Foresman/Dorling Kindersley would like to thank the Natural History Museum, London/DK Images for the use of photos on pages Opener, 4 (BC), 5 (C), 7 (TR, BC, BR), 8 (BL, BCL, BCR, BR), 9 (BL, BCL, BC, CRB, CR), 10 (TL), 12 (CR), 13 (CR), 14 (BR), 16 (BL), 17 (TL), 21 (TCL, TC, TR, CRA, CRB, BCR, BC, BCL, CLB, CL, CLA, TCL), 22 (TR), 23 (CR, B). Unless otherwise acknowledged, all photographs are the copyright © of Dorling Kindersley, a division of Pearson. ISBN: 0-328-13783-9 Copyright © Pearson Education, Inc. All Rights Reserved. Printed in the United States of America. This publication is protected by Copyright, and permission should be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or transmission in any form by any means, electronic, mechanical, photocopying, recording, or likewise. For information regarding permission(s), write to Permissions Department, Scott Foresm