TABLE OF CONTENTS CHAPTER 1 Underground Wonders 5 CHAPTER 2 Wearing Down the Earth 9 CHAPTER 3 Always Changing 15 LANDFORMS OF THE WORLD Son Doong Cave 20 CHAPTER 4 Life Underground 23 Focus on Caves 28 Glossary 30 To Learn More 31 Index 32
CHAPTER 1 UNDERGROUND WONDERS Hundreds of stalactites hang from the ceiling They look like icicles But they are solid rock Water drips from the stalactites It falls into a shallow pool Each drop makes a spooky echo in the cave Crystal Cave in Bermuda has huge stalactites that reach toward blue pools 5
